反应详情

A procedure similar to that described in Preparation 4 was repeated, except that 0.5 g of 2-hydroxymethyl-3-methyl-5-phenylimidazo[5,4-b]pyridine (prepared as described in Preparation 110), 0.97 g of 5-(4-hydroxybenzyl)-3-triphenylmethylthiazolidine-2,4-dione, 0.57 ml of tributylphosphine, 0.53 g of 1,1'-(azodicarbonyl) dipiperidine and 50 ml of benzene were used. After working up the product as described in Preparation 4, the resulting crude product was purified by column chromatography through silica gel, using a 1:1 by volume mixture of hexane and ethyl acetate as the eluent, to give 0.9 g of the title compound having Rf=0.26 (on silica gel thin layer chromatography using a 1:1 by volume mixture of ethyl acetate and hexane as the developing solvent).

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