Tributylphosphine → 5-{4-(3,5,7-Trimethylimidazo[5,4-b]pyridin-2-ylmethoxy)benzyl}-3-triphenylmethylthiazolidine-2,4-dione

Participants

Reaction Steps

A procedure similar to that described in Preparation 4 was repeated, except that 1.47 g of 2-hydroxymethyl-3,5,7-trimethylimidazo[5,4-b]pyridine (prepared as described in Preparation 86), 3.58 g of 5-(4-hydroxy-benzyl)-3-triphenylmethylthiazolidine-2,4-dione, 1.87 g of tributylphosphine, 2.33 g of 1,1'-(azodicarbonyl)di-piperidine and 50 ml of toluene 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 3.5 g of the title compound, melting at 96°-99° C. (softening).

Provenance & Evidence