Rh-catalyzed highly enantioselective formation of functionalized cyclopentanes and cyclopentanones
作者:Fei Liu、Qiang Liu、Minsheng He、Xumu Zhang、Aiwen Lei
DOI:10.1039/b712396e
日期:——
A catalyst system, [Rh(COD)Cl]2–BINAP–AgSbF6, has been developed as a second-generation catalyst for the cycloisomerization of 1,6-enynes tethered by carbon chains. Cyclopentanes and cyclopentanones, which can contain functional groups, such as the 1,4-dienes, vinyl ether, aldehyde etc., were obtained from readily available starting materials in high yields and selectivities. Both regioselectivities and enantioselectivities are excellent: only 1,4-dienes were observed and in over 99% ee.
研究人员开发了[Rh(COD)Cl]2-BINAP-AgSbF6 催化剂体系,作为碳链拴住的 1,6- 烯炔环异构化的第二代催化剂。环戊烷和环戊酮可含有官能团,如 1,4-二烯、乙烯基醚、醛等,这些环戊烷和环戊酮可从容易获得的起始材料中以高产率和高选择性获得。区域选择性和对映体选择性都非常好:只观察到 1,4-二烯,ee 超过 99%。