4-Hydroxybenzaldehyde → Benzaldehyde,4-[(3-methyl-3h-imidazo[4,5-b]pyridin-2-yl)methoxy]-

Participants

Reaction Steps

A procedure similar to that described in Preparation 4 was repeated, except that 500 mg of 3-methylimidazo-[5,4-b]pyridin-2-ylmethanol (prepared as described in Preparation 15), 374 mg of 4-hydroxybenzaldehyde, 0.76 ml of tributylphosphine, 773 mg of 1,1'-(azo-dicarbonyl)dipiperidine and 12 ml of toluene were used, and that the product was purified by column chromatography through silica gel, using a gradient elution method, with mixtures of ethyl acetate and methanol in ratios ranging from 1:0 to 50:1 by volume as the eluent, to give 0.37 g of the title compound, melting at 124°-125° C.

Provenance & Evidence