Iodomethylzinc Phosphates: Powerful Reagents for the Cyclopropanation of Alkenes
作者:Marie-Christine Lacasse、Cyril Poulard、André B. Charette
DOI:10.1021/ja0529687
日期:2005.9.1
stereocontrol, affording the cyclopropanes of allylic and homoallylic ethers with complete conversions and up to 93% ee. A catalytic version of this reaction using 10 mol % of the chiral phosphate reagent is also disclosed.
开发了一类新的源自磷酸的类锌类化合物,并将其用于烯丙醇和醚以及未官能化烯烃的环丙烷化。使用 3,3'-二取代 BINOL 的手性磷酸可实现有效的立体控制,提供具有完全转化率和高达 93% ee 的烯丙基醚和高烯丙基醚的环丙烷。还公开了使用10mol%手性磷酸盐试剂的该反应的催化形式。
Preparation of a Storable Zinc Carbenoid Species and Its Application in Cyclopropanation, Chain Extension, and [2,3]-Sigmatropic Rearrangement Reactions
作者:Arnaud Voituriez、Lucie E. Zimmer、André B. Charette
DOI:10.1021/jo902618e
日期:2010.2.19
The formation of a new phosphate carbenoid (n-BuO)2P(O)OZnCH2I and its application in organozinc-mediated reactions is described. This carbenoid undergoes very slow degradation in solution and can be stored for several weeks at −20 °C. Its reactivity was tested with many representative alkenes and was determined to be a powerful cyclopropanating reagent, giving the corresponding cyclopropanes in 72−99%