Sodium Bicarbonate → L-691121

Participants

Reaction Steps

A suspension of 5-(2-bromoethyl)benzofurazan (0.39 g, 1.72 mmol), 3,4-dihydro-6-methanesulfonamidospiro[(2H)-1-benzopyran-2,4'-piperidine]-4-one hydrochloride (0.24 g, 0.69 mmol) and sodium bicarbonate (0.21 g, 2.55 mmol) in ethanol (13.2 ml) was heated at reflux temperature for 24 hr. Solvent evaporation and chromatography (silica gel, chloroform-methanol-ammonium hydroxide, 97/3/0.3) gave an oil; conversion to the hydrochloride gave the hydrochloride (0.14 g, 41%); mp>250° C. Anal. Calcd for C22H24N4O3 ·HCl C, 53.59; H, 5.12, N, 11.37. Found: C, 53.55; H, 5.15; N, 11.12.

Provenance & Evidence