摘要:
6-Azido and 6-((tert-butyloxycarbonyl)amino)derivatives of meso-2-cycloheptene-1,4-diol were prepared from cycloheptatriene and asymmetrized using Pseudomonas cepacia lipase. Enantiopure intermediates thus prepared were used in the syntheses of both enantiomers of the tropane alkaloid calystegine A(3).