反应详情

A procedure similar to that described in Preparation 15 was repeated, except that 2.6 g of 2-hydroxymethyl-5,7-dimethyl-3H-imidazo[5,4-b]pyridine (prepared as described in Preparation 85), 0.64 g of sodium hydride (as a 55% by weight dispersion in mineral oil), 2.2 g of iodomethane and 80 ml of dimethylformamide were used. After working up the product as described in Preparation 15, the resulting crude product was purified by column chromatography through silica gel, using a 1:6 by volume mixture of- ethanol and ethyl acetate as the eluent, followed by recrystallization from ethyl acetate, to give 1.5 g of the title compound, melting at 178°-179° C.

1. customA procedure similar to that described in Preparation 15
2. customas described in Preparation 15
3. customthe resulting crude product was purified by column chromatography through silica gel
4. additionby volume mixture of- ethanol and ethyl acetate as the eluent
5. customfollowed by recrystallization from ethyl acetate