1-Methylimidazole → 2-nitro-1-(4-nitrophenyl)-2-(tetrahydro-2H-1,3-thiazine-2-ylidene)ethanone

Participants

Reaction Steps

A solution/suspension of 20.4 g of p-nitrobenzoyl chloride in 25 ml of monoglyme was added dropwise at 5°-10° to a solution of 9.09 g of N-methylimidazole in 75 ml of monoglyme and the mixture was stirred for an additional 30 minutes at 5°-10°, after which was added dropwise (same temperature) a solution/suspension of 16.0 g of tetrahydro-2-(nitromethylene)-2H-1,3-thiazine in 25 ml of monoglyme, after which the stirred mixture was allowed to warm to room temperature and stirred for 96 hours. The mixture then was taken up in methylene chloride, washed with water and saturated sodium chloride solution, dried (Na2SO4) and the solvent evaporated under reduced pressure to give an oil which was chromatographed on florosil using methylene chloride as eluent to give a gum, which was washed with ether to give 17, as a yellow solid, m.p.: 158°-160.5°.

Provenance & Evidence