The preparation and reactions of 2-acyl-3-phenylisomenthopyrazole

摘要

3-Phenylisomenthopyrazole (4) was useful as a chiral auxiliary, though the diastereomeric selectivity was lower than those of 3-phenyl-l-menthopyrazole (1a). In alpha-acylation and the Diels-Alder cycloaddition, the absolute configuration of the predominant products was different from that of the products using 1a.