Synthetic Route of 461432-23-5,Some common heterocyclic compound, 461432-23-5, name is 4-Bromo-1-chloro-2-(4-ethoxybenzyl)benzene, molecular formula is C15H14BrClO, 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.
Method 4) 4-bromo-1-chloro-2-(4-ethoxybenzyl)benzene (4.9 g, 15 mmol) and 20 mL of tetrahydrofuran were added to a 50 mL three-necked flask, and the mixture was stirred and cooled to -5 to 0 C.Slowly add isopropylmagnesium chloride Grignard reagent (8 mL, 2 mol/L).The system was stirred at 0 C for 2 h.In another 100mL three-neck bottle,Add (2R,3R,4S,5R,6R)-2-(acetoxymethyl)-6-bromotetrahydro-2H-pyran-3,4,5-triacetyl ester (IIa, 4.1 g, 10 mmol) , tetramethylethylenediamine (10wt%),Cobalt dichloride (10 wt%) and 20 mL of 2-methyltetrahydrofuran,The system was cooled to 0 C.Slowly add the Grignard reagent in the previous 50mL bottle and add it in about 30min.After the completion of the system, the system was warmed to 25 to 30 C, and the mixture was stirred for 2 hours. The system was quenched with 1N aqueous hydrochloric acid and the organic phase was extracted with ethyl acetate.concentrate,Column chromatography (PE/EA=3/1),The target product (4.5 g, yield 84%) was obtained.
The synthetic route of 461432-23-5 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Shanghai Fangnan Biological Technology Co., Ltd.; Zhang Nian; (6 pag.)CN104059041; (2018); B;,
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