Dimethyl Sulfoxide → HCID 11640089, compound

Participants

Reaction Conditions

Reaction Steps

DMSO (2.6 mL, 37.5 mmol) was added at −70° C. to a solution of oxalyl chloride (0.46 mL, 37.5 mmol) in dichloromethane (10 mL). Reaction mixture was stirred for 5 minutes and to this (4-chloro-6-methyl-10,10-dioxo-2-piperazin-1-yl-10,11-dihydro-5-oxa-10lambda*6*-thia-dibenzo[a,d]-cyclohepten-8-yl)-methanol (0.489 g, 1.19 mmol) [obtained by following the procedure described in Example 34] in dichloromethane (5 mL) was added. Reaction mixture was stirred for 5 minutes and to this triethylamine (8.4 mL, 62.5 mmol) was added. Reaction mixture was warmed to room temperature (22° C.) and stirred for 0.5 h. the reaction mixture was diluted with dichloromethane (200 mL), washed with water (100 mL), brine (50 mL) and dried over sodium sulphate. The crude product obtained was purified by column chromatography (silica gel, ethylacetate-pet ether) to obtain the title compound. Yield: 0.2 g (42%); 1H NMR (DMSO-d6, 300 MHz): δ 2.64 (s, 3H, CH3), 3.20 (s, 4H, 2CH2), 3.20 (s, 4H, 2CH2), 5.15 (s, 2H, CH2), 7.14 (d, 2H, Ar), 8.03 (s, 1H, Ar), 8.24 (s, 1H, Ar), 9.97 (s, 1H, CHO); MS: m/e (EI) 406 (M+).

Provenance & Evidence