As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 1193-72-2 name is 1-Bromo-2,4-dichlorobenzene, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below. 1193-72-2
Part C. tert-butyl (7bR,11aS)-6-(2,4-dichloroanilino)-1,2,7b,10,11,11a-hexahydro-4H-pyrido[4,3-b][1,4]thiazepino[6,5,4-hi]indole-9(8H)-carboxylate. An oven dried three-necked round bottom flask was fitted with septa, condenser, and a stopper. The flask was charged with tert-butyl (7bR,11aS)-6-amino-1,2,7b,10,11,11a-hexahydro-4H-pyrido[4,3-b][1,4]thiazepino[6,5,4-hi]indole-9(8H)-carboxylate (134 mg, 0.36 mmol), 1-bromo-2,4-dichlorobenzene (70 mg, 0.31 mmol), NaOtBu (60 mg, 0.62 mmol), and anhydrous toluene (5 mL). The solution was purged with argon at 80 C. for 25 min then cooled to room temperature. While maintaining a blanket of argon, Pd2(dba)3 (3.4 mg, 3.7 mumol), and BINAP (7 mg, 11.2 mumol) were added quickly. The resulting mixture was heated to 80 C. for 20 hours under argon while monitoring the consumption of starting material by TLC (50% ethyl acetate/hexanes). After cooling to room temperature, the dark solution was diluted with ethyl ether (10 mL) and filtered through a pad of silica, washing with ether and ethyl acetate. The resulting solution was concentrated and chromatographed (Combiflash, 95:5 to 75:25 hexanes/ethyl acetate gradient) yielding the title compound (78 mg, 48%) as a tan solid. 1H NMR (CDCl3, 300 MHz) delta 1.41 (s, 9H), 1.79-1.97 (m, 2H), 2.85-3.18 (m, 6H), 3.46-3.61 (m, 4H), 3.68 (s, 2H), 5.84 (s, 1H), 6.71 (d, 1H, J=1.9 Hz), 6.79 (d, 1H, J=1.8 Hz), 6.89 (d, 1H, J=8.8 Hz), 7.01 (dd, 1H, J=2.3, 8.8 Hz), 7.29 (d, 1H, J=2.3 Hz) ppm.
At the same time, in my other blogs, there are other synthetic methods of this type of compound, 1-Bromo-2,4-dichlorobenzene, and friends who are interested can also refer to it.
Reference:
Patent; Robichaud, Albert J.; Fevig, John M.; Mitchell, Ian S.; Lee, Taekyu; Chen, Wenting; Cacciola, Joseph; US2004/186094; (2004); A1;,
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