1-Chloroethyl chloroformate → HCID 10377938, compound

Participants

Reaction Steps

To a solution of 6-chloro-3-methyl-2,3,4,5,10,11-hexahydro-1H,9H-cyclopenta[b][1,4]diazocino[7,8,1-hi]indole (0.33 g, 1.20 mmole) in dichloroethane (80 mL) was added 1-chloroethyl chloroformate (1.2 mL, 10.8 mmole) and the mixture refluxed for 24 hours. The reaction mixture was cooled to room temperature and the solvent removed in vacuo and replaced with methanol (25 mL) and refluxed for another 3 hours. The reaction mixture was then cooled to room temperature and the solvent removed in vacuo. The dark residue was dissolved in methylene chloride (200 mL) and washed with aqueous sodium hydroxide (1N, 150 mL), saturated sodium chloride (150 mL), dried (sodium sulfate) and concentrated. Purification by flash column chromatography (silica gel, 1.5% methanol in dichloromethane) provided 0.25 g of the title compound. 46 mg of this was further treated with one equivalent of fumaric acid in ethanol to form a fumarate salt, mp 188-190° C. MS (ESI) m/z 261 ([M+H]+).

Provenance & Evidence