Ligand-Controlled, Norbornene-Mediated, Regio- and Diastereoselective Rhodium-Catalyzed Intramolecular Alkene Hydrosilylation Reactions
作者:Yuanda Hua、Hiep H. Nguyen、William R. Scaggs、Junha Jeon
DOI:10.1021/ol401464n
日期:2013.7.5
Ligand-controlled, norbornene-mediated, regio- and diastereoselective rhodium-catalyzed intramolecular alkene hydrosilylation of homoallyl silyl ethers (1) exploiting either BINAP or 1,6-bis(diphenylphosphino)hexane (dpph) has been developed. This method permits selective access to either trans-oxasilacyclopentanes (trans-2) or oxasilacyclohexanes (3) at will. A substoichiometric amount of norbornene
已经开发了利用BINAP或1,6-双(二苯基膦基)己烷(dpph)进行配体控制,降冰片烯介导的区域和非对映体选择性铑催化的高烯丙基甲硅烷基醚(1)的分子内烯烃氢化硅烷化反应。该方法允许选择性地访问要么反-oxasilacyclopentanes(反式2)或oxasilacyclohexanes(3随意)。亚化学计量的降冰片烯显着提高了收率和选择性。讨论了降冰片烯介导的氢化物穿梭过程。