Highly regioselective [3,3] rearrangement of aliphatic allyl vinyl ethers catalyzed by a metalloporphyrin complex, Cr(TPP)Cl
作者:Toshikatsu Takanami、Mikiko Hayashi、Kazuhiro Iso、Hirose Nakamoto、Kohji Suda
DOI:10.1016/j.tet.2006.07.051
日期:2006.10
Claisen rearrangement of simple aliphatic allyl vinyl ethers catalyzed by a metalloporphyrin, Cr(TPP)Cl, is described. The porphyrin-based Lewis acid catalyst can effectively accelerate the rearrangement via a concerted [3,3] pathway with a minimal degree of bond ionization of the substrates, providing the corresponding Claisen products in moderate to high yields and almost perfect regioselectivity at low
描述了由金属卟啉Cr(TPP)Cl催化的简单脂肪族烯丙基乙烯基醚的克莱森重排。基于卟啉的路易斯酸催化剂可以通过一致的[3,3]途径有效加速重排,使底物的键合离子化程度最小,从而以中等至高的产率提供相应的克莱森产品,并在低催化剂负载下提供几乎完美的区域选择性。