Total Synthesis of (±)-Calcaridine A and (±)-<i>epi</i>-Calcaridine A
作者:Panduka B. Koswatta、Rasapalli Sivappa、H. V. Rasika Dias、Carl J. Lovely
DOI:10.1021/ol802018r
日期:2008.11.6
The first total synthesis of the Leucetta alkaloid calcaridine A is described based on a biosynthetic postulate. Application of an oxidative rearrangement of a 4,5-disubstituted imidazole leads to the formation of both calcaridine A and epi-calcaridine A. An X-ray crystal structure determination on the latter has allowed the assignment of the relative configuration of the epimeric natural product and calcaridine A by extrapolation.