Enantioselective Cycloisomerization of 1,5‐Enynes Promoted by Cyclometalated NHC–Pt
<sup>II</sup>
–Monophos Catalysts
作者:Hélène Jullien、Delphine Brissy、Pascal Retailleau、Angela Marinetti
DOI:10.1002/ejic.201100818
日期:2011.11
non-migrating oxygen functions at the propargylic carbon atom have been carried out by using Monophos–PtII and Binepine–PtII complexes as chiral precatalysts. They afforded the corresponding bicyclo[3.1.0]hexan-3-one in up to 63 % enantiomeric excess. The stereochemical outcome of these reactions has been investigated in order to highlight possible matching–mismatching effects between the chiral catalyst
已经通过使用 Monophos-PtII 和 Binepine-PtII 配合物作为手性预催化剂进行了在炔丙基碳原子上带有非迁移氧官能团的 1,5-烯炔的对映选择性环异构化。他们以高达 63% 的对映体过量提供了相应的双环 [3.1.0]hexan-3-one。已经研究了这些反应的立体化学结果,以突出手性催化剂和在立体碳上具有相反构型的手性底物之间可能的匹配-失配效应。已经证明了立体碳的显着影响。