Dimethylformamide dimethyl acetal → N-(4-{4-{[(dimethylamino)methylene]amino}-7-[(diphenylmethylene)amino]thieno[3,2-c]pyridin-3-yl}-2-methoxyphenyl)-1-methyl-1H-indole-2-carboxamide

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Reaction Conditions

Reaction Steps

N,N-Dimethylformamide dimethyl acetal (0.116 mL, 0.87 mmol) was added to a solution of N-(4-{4-amino-7-[(diphenylmethylene)amino]thieno[3,2-c]pyridin-3-yl}-2-methoxyphenyl)-1-methyl-1H-indole-2-carboxamide (0.156 g, 0.257 mmol) in N,N-dimethylformamide (6 mL). The solution was stirred at 95° C. for 9 h, then was cooled to ambient temperature, and the mixture was concentrated. Partial purification of the residue by flash column chromatography on silica gel which had been deactivated with triethylamine (10% by volume of silica gel used), using dichloromethane as the mobile phase afforded crude N-(4-{4-{[(dimethylamino)methylene]amino}-7-[(diphenylmethylene)amino]thieno[3,2-c]pyridin-3-yl}-2-methoxyphenyl)-1-methyl-1H-indole-2-carboxamide as a yellow foam (0.16 g, 0.24 mmol): MS: (MH)+ 663.

Provenance & Evidence