Diisopropylethylamine → 5-Chloro-1H-indole-7-carboxylic acid (4-tert-butyl-benzyl)-[2-(3-difluoromethoxy-phenyl)-ethyl]-amide

Participants

Reaction Steps

To a solution of 59 mg (0.3 mmol) of 5-chloro-1H-indole-7-carboxylic acid and 96 mg of TBTU (0.3 mmol) in 3 ml DMF, were added 0.26 ml (1.5 mmol) of N,N-diisopropylethyl amine. After stirring for 5 min at rt, 100 mg (0.3 mmol) of (4-tert-butyl-benzyl)-[2-(3-difluoromethoxy-phenyl)-ethyl]-amine in 2 ml DMF were added. After stirring for 4 h at rt, the reaction mixture was diluted with 50 ml water and extracted with EtOAc (2×). The combined organic phases were washed with water and brine, dried with magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography (8 g silica gel; EtOAc/heptane 1:6) to give 114 mg white solid (67%). MS(ISP) 512.2 (M+H)+.

Provenance & Evidence