反应详情

Reaction of N-(4-chloro-2-nitro-5-trifluoromethyl-phenyl)-acetamide [CAS 157554-77-3] (4.02 g, 14.2 mmol) with Boc-anhydride (3.26 g, 14.9 mmol) according to the general procedure A (method c) and subsequent reaction with ammonium hydroxide (25%; 4.38 ml, 28.4 mmol) gave after aqueous work up and purification by column chromatography on silica gel (hexane/ethyl acetate 4:1) (4-chloro-2-nitro-5-trifluoromethyl-phenyl)-carbamic acid tert-butyl ester (3.39 g, 70%) as an orange oil.

1. customgave after aqueous work up
2. custompurification by column chromatography on silica gel (hexane/ethyl acetate 4:1) (4-chloro-2-nitro-5-trifluoromethyl-phenyl)-carbamic acid tert-butyl ester (3.39 g, 70%) as an orange oil