作者:Paolo Pasetto、Richard W. Franck
DOI:10.1021/jo034607k
日期:2003.10.1
The synthesis of the northwest quadrant of Altromycin B is described. The preparation of the two epimers at the quaternary carbon of the 6-deoxy-C-altrose moiety in the northwest quadrant is accomplished starting from d-glucose. A key step of our synthetic sequence is the formation of the C-glycoside linkage via the Ramberg-Backlund reaction. Two different routes are explored, which differ mainly on
描述了阿霉素B西北象限的合成。从d-葡萄糖开始,完成西北象限中6-脱氧-C-altrose部分的季碳上的两个差向异构体的制备。我们合成序列的关键步骤是通过Ramberg-Backlund反应形成C-糖苷键。探索了两种不同的途径,其主要不同之处在于在制备C-糖苷之前或之后,葡萄糖转化为altrose的时间。还讨论了各种取代的C-altropyranoside环的构象行为。