作者:Sharmila Banerjee Mukhopadhyay、Umesh R. Desai、Girish K. Trivedi
DOI:10.1080/00397919108019755
日期:1991.3
The difficulties encountered in the protection of 3-alpha-hydroxy group of lithocholic acid 1 with three different types of protective groups are described. Only benzyl ether derivative was found to be suitable for synthetic transformations. The methodology for the synthesis of benzyl ethers of A/B cis steroids is reported for the first time.