Chemoselective removal and replacement of the C-4′ and C-6 acyl esters of zaragozic Acid A
作者:Robert M. Burk、Gregory D. Berger、Robert L. Bugianesi、Narindar N. Girotra、William H. Parsons、Mitree M. Ponpipom
DOI:10.1016/s0040-4039(00)77469-7
日期:1993.2
An efficient chemical sequence is described for the modification of the C-4′ and C-6 positions of zaragozic acid A. Key reactions include the specific conditions devised for selective removal of either the C-4′ acetate or the C-6 acyl chain. The resultant hydroxy intermediates were then derivatized as esters, ethers, carbamates, and carbonates.