Rhodium-Catalyzed Carbonylation of Cyclopropyl Substituted Propargyl Esters: A Tandem 1,3-Acyloxy Migration [5 + 1] Cycloaddition
作者:Dongxu Shu、Xiaoxun Li、Min Zhang、Patrick J. Robichaux、Ilia A. Guzei、Weiping Tang
DOI:10.1021/jo300973r
日期:2012.8.3
We have developed two different types of tandem reactions for the synthesis of highly functionalized cyclohexenones from cyclopropyl substituted propargyl esters. Both reactions were initiated by rhodium-catalyzed Saucy-Marbet 1,3-acyloxy migration. The resulting cyclopropyl substituted allenes derived from acyloxy migration then underwent [5 + 1] cycloaddition with CO. The acyloxy group not only eased the access to allene intermediates but also provided a handle for further selective functionalizations.
Synthesis of Highly Functionalized Cyclohexenone Rings: Rhodium-Catalyzed 1,3-Acyloxy Migration and Subsequent [5+1] Cycloaddition
作者:Dongxu Shu、Xiaoxun Li、Min Zhang、Patrick J. Robichaux、Weiping Tang
DOI:10.1002/anie.201006881
日期:2011.2.7
from cyclopropyl‐substituted propargyl esters by using a [Rh(CO)2Cl}2] catalyst. This metal catalyst promoted the 1,3‐acyloxy migration of propargyl esters and a subsequent [5+1] cycloaddition of the resulting allenylcyclopropanes in the presence of CO with high regioselectivity.
Lead Rh-ole:通过使用 [Rh(CO) 2 Cl} 2 ] 催化剂,由环丙基取代的炔丙酯制备高度取代的环己烯酮。这种金属催化剂在 CO 存在下促进了炔丙酯的 1,3-酰氧基迁移和随后得到的烯丙基环丙烷的 [5+1] 环加成反应,具有高区域选择性。