Scope of the Intramolecular Titanocene-Catalyzed Pauson−Khand Type Reaction<sup>1</sup>
作者:Frederick A. Hicks、Natasha M. Kablaoui、Stephen L. Buchwald
DOI:10.1021/ja990682u
日期:1999.6.1
A Pauson−Khand type conversion of enynes to bicyclic cyclopentenones employing the commercially available precatalyst titanocene dicarbonyl is described. This methodology shows excellent functional group tolerance for a group 4 metallocene-catalyzed process. The scope and limitations of this cyclization with respect to 1,6-, 1,7- and 1,8-enynes with a variety of terminal alkyne substituents, chiral
描述了使用市售的前催化剂二茂钛二羰基将烯炔转化为双环环戊烯酮的 Pauson-Khand 型转化。该方法对第 4 族茂金属催化过程显示出优异的官能团耐受性。详细描述了关于具有各种末端炔烃取代基的 1,6-、1,7- 和 1,8- 烯炔、手性烯炔和含有取代烯烃的烯炔的这种环化的范围和限制。已经提出了涉及中间体钛环戊烯羰基化的机制。