16-Sep-2021 News Brief introduction of 1303587-99-6

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Adding a certain compound to certain chemical reactions, such as: 1303587-99-6, name is 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, belongs to chlorides-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 1303587-99-6, Formula: C6H6ClN3O

Synthesis of2-chloro-8-(2, 2, 2-trifluoroethyl)-7, 8-dihydro-6H-pyrimido [5, 4-b] [I, 4] oxazine [0414] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (500 mg, 2.92 mmol) in DMF (5 mL) under argon atmosphere were added cesium carbonate (1.9 g, 5.84 mmol) and 1, 1, l-trifluoro-2-iodoethane (611 mg, 2.92 mmol) at RT and the mixture was stirred for 32 h. After consumption of the starting materials (monitored by TLC), the reaction was diluted with water (20 mL) and extracted with EtOAc (2 x 20 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The crude material was purified by silica gel column chromatography using 20% EtOAc:hexanes to afford 2-chloro-8-(2, 2, 2-trifluoroethyl)-7, 8-dihydro-6H-pyrimido [5, 4- b] [1, 4] oxazine (235 mg, 32%) as an off-white solid. 1H-NMR (CDC13, 500 MHz): delta 7.79 (s, 1H), 4.30-4.28 (m, 2H), 4.27-4.23 (m, 2H), 3.70-3.68 (m, 2H); LC-MS: 254.4 (M+1); (column; X-Select CSH C-18 (50 3.0 mm, 3.5 mupiiota); RT 3.76 min. 0.05% Aq TFA: ACN; 0.80 mL/min); TLC: 60% EtOAc:hexanes (R/. 0.6).

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Simple exploration of 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine

According to the analysis of related databases, 1303587-99-6, the application of this compound in the production field has become more and more popular.

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 1303587-99-6, name is 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, This compound has unique chemical properties. The synthetic route is as follows., Recommanded Product: 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine

Synthesis of2-chloro-8-(4-(trifluoromethyl) benzyl)-7, 8-dihydro-6H-pyrimido [5, 4-b] [I, 4] [0459] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (150 mg, 0.87 mmol) in DMF (3 mL) under argon atmosphere were added sodium hydride (42 mg, 1.75 mmol) and l-(bromomethyl)-4-(trifluoromethyl) benzene (251 mg, 1.05 mmol) at 0 C. The reaction mixture was stirred for 30 min at 0 C. After consumption of the starting materials (monitored by TLC), the reaction was quenched with cold water (20 mL) and extracted with EtOAc (2 x 100 mL). The combined organic extracts were washed with brine (5 mL), dried over sodium sulfate, filtered and concentrated in vacuo. The crude material was washed with n-pentane (2 x 5 mL) to afford 2-chloro-8-(4-(trifluoromethyl) benzyl)-7, 8- dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (220 mg, 76%) as an off-white solid. 1H-NMR (OMSO-d6, 500 MHz): delta 7.76 (s, 1H), 7.74 (d, 2H), 7.52 (d, 2H), 4.89 (s, 2H), 4.23-4.20 (m, 2H), 3.57-3.54 (m, 2H); LCMS: 329.8 (M+l); (column; X-Select CSH C-18 (50 3.0 mm, 3.5 mupiiota); RT 3.88 min 0.05% Aq TFA: ACN; 0.80 mL/min); UPLC (purity): 90.0%; (column; Acquity UPLC BEH C-18 2.1 X 50 mm, 1.7 mupiiota); RT 2.58 min. ACN: 0.025% Aq TFA; 0.5 mL/min; TLC: 30% EtOAc/hexane (R 0.4).

According to the analysis of related databases, 1303587-99-6, the application of this compound in the production field has become more and more popular.

Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Simple exploration of C6H6ClN3O

The synthetic route of 1303587-99-6 has been constantly updated, and we look forward to future research findings.

1303587-99-6, name is 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, belongs to chlorides-buliding-blocks compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. Recommanded Product: 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine

Synthesis of 2-chloro-8-(4-fluorobenzyl)-7 , 8-dihydro-6H-pyrimido [5, 4-b] [I, 4] oxazine [0440] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (100 mg, 0.58 mmol) in DMF (1 mL) under argon atmosphere was added sodium hydride (27 mg, 1.16 mmol) at 0 C. After stirring for 10 mins, l-(bromomethyl)-4-fluorobenzene (132 mg, 0.70 mmol) was added at 0 C and stirred for 1 h. After consumption of the starting materials (monitored by TLC), the reaction was quenched with ice water (20 mL) and extracted with EtOAc (2 x 20 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo to afford 2-chloro-8-(4-fluorobenzyl)-7, 8-dihydro- 6H-pyrimido [5, 4-b] [1, 4] oxazine (150 mg, 92%) as an off-white solid. 1H-NMR (DMSO- d6, 400 MHz): delta 7.70 (s, 1H), 7.36 (t, 2H), 7.18 (t, 2H), 4.75 (s, 2H), 4.19-4.16 (m, 2H), 3.51- 3.48 (m, 2H); LCMS: 279.9 (M+1); (column; X-Select CSH C-18 (50 3.0 mm, 3.5 mupiiota); RT 3.59 min 0.05% Aq TFA: ACN; 0.80 mL/min); TLC: 60% EtOAc/hexane (R 0.5).

The synthetic route of 1303587-99-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

The important role of 1303587-99-6

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, other downstream synthetic routes, hurry up and to see.

Electric Literature of 1303587-99-6, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 1303587-99-6, name is 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine belongs to chlorides-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

Synthesis ofN-(3-methoxy-4-(2-methylpyridin-4-yl) phenyl)-, 8-dihydro-6H-pyrimido [5, 4- b] [I, 4] oxazin-2-amine [0350] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (1 g, 5.81 mmol) in isopropyl alcohol (20 mL) under argon atmosphere were added 3- methoxy-4-(2-methylpyridin-4-yl) aniline (1.2 g, 5.81 mmol) and concentrated hydrochloric acid (12M, 0.5 mL) at RT. The reaction mixture was stirred at 120 C for 48 h in a sealed tube. After completion of the reaction (monitored by TLC), the volatile components were removed in vacuo. The resultant residue was basified with a saturated sodium bicarbonate solution (50 mL) and extracted with a 10% MeOH:CH2Cl2 solution (2 x 50 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The crude material was purified by silica gel column chromatography using 6% MeOH:CH2Cl2 to afford N-(3-methoxy-4-(2-methylpyridin-4-yl) phenyl)-7, 8-dihydro-6H- pyrimido [5, 4-b] [1, 4] oxazin-2-amine (950 mg, 47%) as a pale yellow solid. 1H-NMR (DMSO-d6, 500 MHz): delta 8.96 (s, IH), 8.36-8.35 (m, IH), 7.73 (s, IH), 7.51 (s, IH), 7.37 (d, 2H), 7.33 (s, IH), 7.29-7.28 (m, IH), 7.21 (d, IH), 4.07-4.05 (m, 2H), 3.78 (s, 3H), 3.45-3.43 (m, 2H), 2.47 (s, 3H); LC-MS: 350.2 (M+1); (column; X-Bridge C-18 (50 3.0 mm, 3.5 mupiiota); RT 2.47 min. 0.05% aq TFA: ACN; 0.80 mL/min); UPLC (column; Acquity UPLC BEH C-18 2.1 X 50 mm, 1.7 mupiiota); RT 1.20 min. ACN: 0.025% TFA (Aq); 0.50 mL/min; TLC: 10% MeOH:CH2Cl2 (R/. 0.6).

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Extracurricular laboratory: Synthetic route of 1303587-99-6

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, its application will become more common.

Electric Literature of 1303587-99-6,Some common heterocyclic compound, 1303587-99-6, name is 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, molecular formula is C6H6ClN3O, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

Synthesis of (2-chloro-6, 7-dihydro-8H-pyrimido [5, 4-b] [I, 4] omicronchialphazetaeta-8-yl) (phenyl) methanone [0426] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (150 mg, 0.87 mmol) in DMF (1.5 mL) under argon atmosphere were added sodium hydride (70 mg, 1.74 mmol) and benzoyl chloride (184 mg, 1.30 mmol) at 0C. The reaction mixture was stirred for 10 min at 0 C. After consumption of the starting materials (monitored by TLC), the reaction was quenched with water (50 mL) and extracted with EtOAc (2 x 50 mL). The combined organic extracts were washed with a saturated sodium bicarbonate solution (20 mL), dried over sodium sulfate, filtered and concentrated in vacuo. The crude material was purified by column chromatography using 35% EtOAc:hexanes to afford (2-chloro-6, 7- dihydro-8H-pyrimido [5, 4-b] [1, 4] oxazin-8-yl) (phenyl) methanone (160 mg, 66%>) as an off-white solid. 1H-NMR (CDC13, 500 MHz): delta 8.10 (s, 1H), 7.53-7.50 (m, 3H), 7.40-7.38 (m, 2H), 4.50-4.47 (m, 2H), 4.10-4.08 (m, 2H); LCMS: 276.3 (M+1); (column; X-Select CSH C-18 (50 3.0 mm, 3.5 mupiiota); RT 3.89 min. 0.05% Aq TFA: ACN; 0.80 mL/min); TLC: 50% EtOAc:hexanes (R 0.5).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, its application will become more common.

Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Brief introduction of 1303587-99-6

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Adding a certain compound to certain chemical reactions, such as: 1303587-99-6, name is 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, belongs to chlorides-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 1303587-99-6, Application In Synthesis of 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine

Synthesis of2-chloro-8-(2, 2, 2-trifluoroethyl)-7, 8-dihydro-6H-pyrimido [5, 4-b] [I, 4] oxazine [0414] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (500 mg, 2.92 mmol) in DMF (5 mL) under argon atmosphere were added cesium carbonate (1.9 g, 5.84 mmol) and 1, 1, l-trifluoro-2-iodoethane (611 mg, 2.92 mmol) at RT and the mixture was stirred for 32 h. After consumption of the starting materials (monitored by TLC), the reaction was diluted with water (20 mL) and extracted with EtOAc (2 x 20 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The crude material was purified by silica gel column chromatography using 20% EtOAc:hexanes to afford 2-chloro-8-(2, 2, 2-trifluoroethyl)-7, 8-dihydro-6H-pyrimido [5, 4- b] [1, 4] oxazine (235 mg, 32%) as an off-white solid. 1H-NMR (CDC13, 500 MHz): delta 7.79 (s, 1H), 4.30-4.28 (m, 2H), 4.27-4.23 (m, 2H), 3.70-3.68 (m, 2H); LC-MS: 254.4 (M+1); (column; X-Select CSH C-18 (50 3.0 mm, 3.5 mupiiota); RT 3.76 min. 0.05% Aq TFA: ACN; 0.80 mL/min); TLC: 60% EtOAc:hexanes (R/. 0.6).

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it.

Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Application of 1303587-99-6

According to the analysis of related databases, 1303587-99-6, the application of this compound in the production field has become more and more popular.

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 1303587-99-6, name is 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, This compound has unique chemical properties. The synthetic route is as follows., Computed Properties of C6H6ClN3O

Synthesis of 8-benzyl-2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [I, 4] oxazine [0420] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine 1 (50 mg, 0.29 mmol) in DMF (0.25 mL) under argon atmosphere was added sodium hydride (35 mg, 0.87 mmol) at 0 C. After stirring for 5 mins, benzyl bromide (0.035 mL, 0.29 mmol) was added to the reaction mixture at RT and stirred for 2 h. After consumption of the starting materials (monitored by TLC), the reaction was diluted with water (10 mL) and extracted with 5% MeOH/ CH2CI2 (2 x 5 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The crude material was purified by column chromatography using 2% MeOH: CH2CI2 to afford 8-benzyl-2-chloro-7, 8-dihydro- 6H-pyrimido [5, 4-b] [1, 4] oxazine (75 mg, 98%) as an off-white solid. 1H-NMR (DMSO-<, 400 MHz): delta 7.70 (s, 1H), 7.33-7.21 (m, 5H), 4.78 (s, 2H), 4.20-4.17 (m, 2H), 3.50-3.48 (m, 2H); LCMS: 262.3 (M+l); (column; X-Select CSH C-18 (50 3.0 mm, 3.5 mupiiota); RT 4.10 min. 0.05% Aq TFA: ACN; 0.80 mL/min); TLC: 5% MeOH/ CH2C12 (R 0.7). According to the analysis of related databases, 1303587-99-6, the application of this compound in the production field has become more and more popular. Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Simple exploration of 1303587-99-6

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, its application will become more common.

Related Products of 1303587-99-6,Some common heterocyclic compound, 1303587-99-6, name is 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, molecular formula is C6H6ClN3O, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

Synthesis of2-chloro-8-(2-(trifluoromethyl) benzyl)-7, 8-dihydro-6H-pyrimido [5, 4-b] [I, 4] oxazine [0458] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (150 mg, 0.87 mmol) in DMF (3 mL) under argon atmosphere were added sodium hydride (42 mg, 1.75 mmol) portion- wise for 5 min then l-(bromomethyl)-2-(trifluoromethyl) benzene (251 mg, 1.05 mmol) at 0 C. The reaction mixture was stirred for 1 h at 0 C. After consumption of the starting materials (monitored by TLC), the reaction was diluted with cold water (50 mL) and extracted with EtOAc (2 x 50 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The crude material was washed with n-pentane (2 x 5 mL) to afford 2-chloro-8-(2-(trifluoromethyl) benzyl)-7, 8-dihydro-6H- pyrimido [5, 4-b] [1, 4] oxazine (160 mg, 55%) as an off-white solid. 1H-NMR (DMSO-<, 400 MHz): delta 7.79-7.77 (m, 2H), 7.65 (t, 1H), 7.52 (t, 1H), 7.40 (d, 1H), 4.95 (s, 2H), 4.29- 4.23 (m, 2H), 3.57-3.50 (m, 2H); LCMS: 329.8 (M+l); (column; X-Select CSH C-18 (50 3.0 mm, 3.5 mupiiota); RT 3.87 min. 0.05% Aq TFA: ACN; 0.80 mL/min); UPLC (purity): 92.4%; (column; Acquity UPLC BEH C-18 2.1 X 50 mm, 1.7 mupiiota); RT 2.57 min. ACN: 0.025% TFA (Aq); 0.50 mL/min; TLC: 30% EtOAc:hexanes (R 0.6). These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, its application will become more common. Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Simple exploration of 1303587-99-6

According to the analysis of related databases, 1303587-99-6, the application of this compound in the production field has become more and more popular.

In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 1303587-99-6 as follows. Safety of 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine

Synthesis of2-chloro-8-(4-(trifluoromethoxy) benzyl)-7, 8-dihydro-6H-pyrimido [5, 4-b] [I, 4] oxazine [0456] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (150 mg, 0.87 mmol) in DMF (5 mL) under argon atmosphere were added sodium hydride (42 mg, 1.75 mmol) and l-(bromomethyl)-4-(trifluoromethoxy) benzene (268 mg, 1.05 mmol) at 0C. The reaction mixture was warmed to RT and stirred for 1 h. After consumption of the starting materials (monitored by TLC), the reaction was diluted with water (20 mL) and extracted with EtOAc (2 x 20 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The crude material was purified by column chromatography using 40% EtOAc:hexane to afford 2-chloro-8-(4- (trifluoromethoxy) benzyl)-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (160 mg, 53%>) as an off-white solid. 1H-NMR (DMSO-<, 400 MHz): delta 7.71 (s, 1H), 7.42 (d, 2H), 7.34 (d, 2H), 4.80 (s, 2H), 4.21-4.19 (m, 2H), 3.52-3.50 (m, 2H); LCMS: 345.8 (M+); (column; X- Select CSH C-18 (50 3.0 mm, 3.5 mupiiota); RT 3.94 min 0.05% Aq TFA: ACN; 0.80 mL/min); TLC: 60% EtOAc/hexane (R 0.6). According to the analysis of related databases, 1303587-99-6, the application of this compound in the production field has become more and more popular. Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Share a compound : 1303587-99-6

The synthetic route of 1303587-99-6 has been constantly updated, and we look forward to future research findings.

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 1303587-99-6, name is 2-Chloro-7,8-dihydro-6H-pyrimido[5,4-b][1,4]oxazine, A new synthetic method of this compound is introduced below., SDS of cas: 1303587-99-6

Synthesis of 2-chloro-8-methyl-7, 8-dihydro-6H-pyrimido [5, 4-b] [I, 4] oxazine [0425] To a stirred solution of 2-chloro-7, 8-dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (100 mg, 0.58 mmol) in DMF (5 mL) under argon atmosphere were added potassium carbonate (242 mg, 1.75 mmol) and methyl iodide (0.03 mL, 0.58 mmol) at RT. The reaction mixture was stirred for 16 h. After consumption of the starting materials (monitored by TLC), the reaction was diluted with water (10 mL) and extracted with EtOAc (2 x 10 mL). The combined organic extracts were dried over sodium sulfate, filtered and concentrated in vacuo. The crude material was washed with n-hexane (2 x 5 mL) to afford 2-chloro-8-methyl-7, 8- dihydro-6H-pyrimido [5, 4-b] [1, 4] oxazine (28 mg) as a white solid. This compound was used without further purification. 1H-NMR (CD3OD, 500 MHz): delta 7.54 (s, 1H), 4.23-4.20 (m, 2H), 3.60-3.58 (m, 2H), 3.19 (s, 3H); LCMS: 186.1 (M+1); (column; X-Select CSH C-18 (50 x 3.0 mm, 3.5 mupiiota); RT 1.76 min. 0.05% Aq TFA: ACN; 0.80 mL/min); TLC: 50% EtOAc/hexanes (Rf: 0.6).

The synthetic route of 1303587-99-6 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; FORUM PHARMACEUTICALS INC.; BURNETT, Duane, A.; BURSAVICH, Matthew, Gregory; MCRINER, Andrew, J.; WO2015/66697; (2015); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics