Metalloporphyrin Cr(TPP)Cl-catalyzed Claisen rearrangement of simple aliphatic allyl vinyl ethers and its unique stereoselectivity
作者:Toshikatsu Takanami、Mikiko Hayashi、Kohji Suda
DOI:10.1016/j.tetlet.2005.02.136
日期:2005.4
The catalytic Z-selective Claisen rearrangement of simple aliphatic allyl vinyl ethers can be achieved using a chromium(III) porphyrin complex, Cr(TPP)Cl, as a catalyst: Cr(TPP)Cl significantly enhances reversal of E–Z selectivity in the thermal Claisen rearrangement of allyl vinyl ethers, especially, 4,5- and 4,6-disubstituted derivatives, at low catalyst loading.
简单的脂族烯丙基乙烯基醚的Z选择性催化克莱森重排可以使用铬(III)卟啉络合物Cr(TPP)Cl作为催化剂来实现:Cr(TPP)Cl显着增强了E - Z选择性的逆转。在低催化剂负载下,烯丙基乙烯基醚,特别是4,5-和4,6-二取代衍生物的热克莱森重排。