HCID 17773803, compound → HCID 20639574, compound

Participants

Reaction Steps

The procedure of Synthesis Example 10-a) is repeated, except that 1.53 g of 5-methylimidazo[5,1-b]thiazole and 3.46 g of (3R,5S)-1-allyloxycarbonyl-3-t-butyldimethylsilyloxy-5-formylpyrrolidine is used and the purification is successively performed by column chromatography on silica gel (ethyl acetate:methanol=9:1) and on Sephadex LH-20 (dichloromethane:methanol=1:1) to give 0.92 g of (3R,5S)-1-allyloxycarbonyl-3-t-butyldimethylsilyloxy-5-[1-hydroxy-1-(5-methylimidazo[5,1-b]thiazol-2-yl)methyl]pyrrolidine (a diastereomer mixture) as a slightly yellow amorphous material.

Provenance & Evidence