(3,4-Dichlorophenyl)acetonitrile → HCID 16079683, 화합물

To a solution of 2-(3,4-Dichlorophenyl)acetonitrile (3.5 g, 18.81 mmol) and (S)-(+)-Epichlorohydrin (1.877 ml, 23.99 mmol) in tetrahydrofuran (18.5 mL) at −15° C. (dry ice/ethanol/water bath, internal temp monitored with thermocouple) under atmosphere of N2 was added sodium bis(trimethylsilyl)amide (16.5 mL, 33.0 mmol) dropwise over 3 hours. The reaction mixture was stirred for additional 3 hours at −15° C., then, overnight at 4° C. (cold room). The mixture was cooled to −5° C. and borane-methyl sulfide complex (4.4 mL, 44.0 mmol) was added over 2 hours via syringe pump. The reaction mixture was then gradually warmed to 40° C. over 3 hours. After aging 1.5 hours at 40° C., the reaction mixture was cooled to 20-25° C. and slowly quenched into a 2N HCl solution (27.7 L). The quenched mixture was then stirred for 1 h at 40° C. Ammonium hydroxide concentrated (6.3 L) was added and the aqueous layer was discarded. i-PrOAc (18.5 L) and 5% dibasic sodium phosphate (18.5 L) were charged. The organic phase was then washed with saturated brine (18.5 L), dried over magnesium sulfate, filtered and evaporated to afford title compound 487 (4.63 g, 100%).