Synthesis of a Ketone Analogue of Biotin via the Intramolecular Pauson−Khand Reaction
作者:Eric McNeill、Irwin Chen、Alice Y. Ting
DOI:10.1021/ol061862t
日期:2006.9.1
[GRAPHICS]We report an improved synthesis of 5-(5-oxohexahydrocyclopenta[c]thiophen-1-yl)pentanoic acid (ketone biotin, 1) based on the intramolecular Pauson-Khand cyclization. The synthesis proceeds in eight steps and in 2.7% overall yield from cyclohexene.