Crotylation versus Propargylation: Two Routes for the Synthesis of the C13−C18 Fragment of the Antibiotic Branimycin
作者:Wolfgang Felzmann、Daniele Castagnolo、Daniela Rosenbeiger、Johann Mulzer
DOI:10.1021/jo062502m
日期:2007.3.1
The C13−C18 fragment 3 of the novel antibiotic branimycin was prepared along two highly stereocontrolled routes. The first one uses a standard Roush crotylation protocol, whereas the second one proceeds via an allenyl silane propargylation with unexpected stereochemical consequences, which are discussed in detail.
新型抗生素布雷尼霉素的C13-C18片段3沿两条高度立体控制的途径制备。第一个使用标准的Roush crotylation协议,而第二个通过烯丙基硅烷的炔丙基化进行,具有意想不到的立体化学后果,将对此进行详细讨论。