反应详情

A procedure similar to that described in Example 6 was repeated, except that 1.20 g of 5-{4-(5-benzyloxy-3-methylimidazo[5,4-b]pyridin-2-ylmethoxy)benzyl}-3-triphenylmethylthiazolidine-2,4-dione (prepared as described in Preparation 95), 1.80 g of 10% w/w palladium-on-charcoal and 50 ml of methanol 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 10:1 by volume as the eluent, to give 0.10 g of the title compound, melting at 240°-242° C.

1. customthat the product was purified by column chromatography through silica gel
2. washa gradient elution method