Chlorinative Cyclization of 1,6-Enynes by Enantioselective Palladium(II)/Palladium(IV) Catalysis
作者:Kazuhiro Takenaka、Shintaro Hashimoto、Shinobu Takizawa、Hiroaki Sasai
DOI:10.1002/adsc.201000926
日期:2011.5.9
A novel asymmetric catalysis via a palladium(II)/palladium(IV) cycle has been developed by utilizing a chiral spiro bis(isoxazoline) ligand (SPRIX). Intramolecular chlorinative cyclization of 1,6‐enynes catalyzed by a palladium‐SPRIX complex proceeded enantioselectively to afford α‐methylene‐γ‐lactone derivatives.
通过利用手性螺双(
异恶唑啉)
配体(
SPRIX),开发了经由
钯(II)/
钯(IV)循环的新型不对称催化。
钯-
SPRIX配合物催化的1,6-
炔烃的分子内
氯化环化选择性进行,得到α-亚甲基-γ-内酯衍
生物。