A novel convenient synthesis of the hypoglycemic agent mitiglinide was developed. (2S)-4-[(3aR,7aS)-Octahydro- 2H-isoindol-2-yl]-4-oxo-2-benzyl-butanoic acid (6) was prepared by selective hydrolysis of ethyl 4-[(3aR,7aS)- octahydro-2Hisoindol2-yl]-4-oxo-2-benzyl-butanoate (5) using alpha-chymotrypsin; the latter was prepared by a novel facile route from (3aR,7aS)-octahydro-2H-isoindole. The overall yield was 25.6%.
A novel convenient synthesis of the hypoglycemic agent mitiglinide was developed. (2S)-4-[(3aR,7aS)-Octahydro- 2H-isoindol-2-yl]-4-oxo-2-benzyl-butanoic acid (6) was prepared by selective hydrolysis of ethyl 4-[(3aR,7aS)- octahydro-2Hisoindol2-yl]-4-oxo-2-benzyl-butanoate (5) using alpha-chymotrypsin; the latter was prepared by a novel facile route from (3aR,7aS)-octahydro-2H-isoindole. The overall yield was 25.6%.