Potassium Carbonate → (2-Nitro-4-trifluoromethyl-5-vinyl-phenyl)-carbamic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

A suspension of (5-chloro-2-nitro-4-trifluoromethyl-phenyl)-carbamic acid tert-butyl ester (Compound A1) (6.8 g, 20 mmol), vinyl boronic acid [CAS-No. 4363-34-2] {Bull. Soc. Chim. Fr. 8:2557–64 (1966)} (4.312 g, 60 mmol) and K2CO3 (8.29 g, 60 mmol) in water (10 mL) and dioxane (50 mL) was purged by Ar-stream at 23° C. for 10 min, then tetrakis(triphenylphosphine) palladium(0) (693 mg, 0.6 mmol) was added and the mixture was heated to 100° C. for 20 h, filtered, evaporated and purified by column chromatography on silica gel (hexane/ethyl acetate 9:1) to yield compound A15.

Provenance & Evidence