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。
Enantioselective Cyclopropanation with TADDOL-Derived Phosphate Ligands
作者:Arnaud Voituriez、André B. Charette
DOI:10.1002/adsc.200600351
日期:2006.11
The synthesis of new chiral TADDOL-derived phosphate ligands is described. The ligands were efficiently synthesized on a multi-gram scale in three steps starting from the readily available corresponding TADDOL and were fully characterized. An X-ray structure was obtained and compared to known BINOL-phosphates. Their use in the asymmetric Simmons–Smith cyclopropanation of both functionalized and unfunctionalized