4-(2-Acetyl-3-oxo-1-butenyl)benzonitrile → Benzyl 4-acetyl-3-(4-cyanophenyl)-5-oxo-2-({[3-(trifluoromethyl)phenyl]amino}carbonyl)hexanoate

Participants

Reaction Steps

To a stirred solution of benzyl 3-oxo-3-{[3-(trifluoromethyl)phenyl]amino}propanoate (6.7 g, 19.2 mmol) (Example 3A) and 4-(2-acetyl-3-oxobut-1-en-1-yl)benzonitrile (4.2 g, 19.2 mmol) (Example 4A) in tetrahydrofuran (140 ml) is added tetrabutylammonium fluoride (9.9 ml of a 1 M solution in tetrahydrofuran). The reaction is stirred for 2 hours at room temperature, then concentrated in vacuo and chromatographed over silica gel 60 with cyclohexane/ethyl acetate mixtures as eluent. The product is isolated as a mixture of diastereomers.

Provenance & Evidence