Enantioselective syntheses of poison-frog alkaloids: 219F and 221I and an epimer of 193E
作者:Naoki Toyooka、Zhou Dejun、Hideo Nemoto、H. Martin Garraffo、Thomas F. Spande、John W. Daly
DOI:10.1016/j.tetlet.2005.11.046
日期:2006.1
Enantioselective syntheses of indolizidines (−)-219F and (−)-221I have been achieved and the relative stereochemistries of natural 219F and 221I were determined by the present synthesis. A levorotatory indolizidine, corresponding to one proposed structure for 193E, was also synthesized, but was found to differ from 193E. It seems likely that natural 193E is the 8-epimer of the synthesized indolizidine
已经实现了吲哚并核苷(-)- 219F和(-)- 221I的对映选择性合成,并且通过本合成确定了天然219F和221I的相对立体化学。还合成了左旋吲哚并咪唑,其对应于一种针对193E的建议结构,但发现与193E不同。天然的193E似乎是合成的吲哚并立定的8表位。