Lawesson's reagent → HCID 178501057, compound

Participants

Reaction Steps

A solution of trans-4-[2-(6-bromopyridin-2-yl)-2-oxoethylcarbamoyl]cyclohexanecarboxylic acid methyl ester (7.38 g, 19.3 mmol) obtained in Step 2 and a Lawesson reagent (8.20 g, 20.3 mmol) in tetrahydrofuran (120 ml) was heated at reflux for 2 hours in an Ar stream. After the reaction solution was concentrated, a saturated aqueous sodium bicarbonate was added and extracted with ethyl acetate. The organic layer was washed with a saturated sodium bicarbonate aqueous solution and dried over magnesium sulfate, and after concentrated, the residue was purified by flash chromatography on silica gel (n-hexane:ethyl acetate=1:1) and the title compound (6.1 g) was obtained.

Provenance & Evidence