反应详情

To a stirring solution of racemic 2-phenyl-3-(toluene-4-sulfonyl)-3-aza-bicyclo[3.1.0]hexane-1-carboxylic acid (1.5 g, 4.2 mmol) (Intermediate 2) and one drop DMF in 10 mL of toluene at 0° C. was added thionyl chloride (8.6 mL, 11.8 mmol). The reaction was allowed to warm to room temperature and then heated to 73° C. for 2.5 hours. The solvent and excess thionyl chloride were evaporated at reduced pressure to leave 2-phenyl-3-(toluene-4-sulfonyl)-3-aza-bicyclo[3.1.0]hexane-1-carbonyl chloride (1.6 g, 100% crude yield).

1. temperatureheated to 73° C. for 2.5 hours
2. customThe solvent and excess thionyl chloride were evaporated at reduced pressure