The use of Hagemann's esters to prepare highly functionalized phenols and benzenes
作者:George Majetich、Scott Allen
DOI:10.3998/ark.5550190.0011.410
日期:——
Hagemann’s esters can be converted into highly functionalized phenols or arenes. The systematic functionalization of Hagemann’s ester derivatives permits the preparation of triand tetraalkylsubstituted phenols or tetra-, penta-, and hexaalkyl-substituted benzenes. Kotnis’s aromatization procedure was found to be solvent dependent, and Suzuki couplings were found to be sensitive to steric hindrance
Dehydrogenation Based Asymmetric Epoxidation of Arylalkanes to Chiral Epoxides
作者:Yiting Su、Feng Yu、Guixia Liu、Zheng Huang
DOI:10.1002/cjoc.202200304
日期:2022.10
We report herein a formal asymmetricepoxidation of arylalkanes enabled by a one-pot dual-catalysts system comprising a pincer Ir catalyst for alkane dehydrogenation-alkene isomerization (AD-ISO) and a chiral ketone catalyst for asymmetric alkene epoxidation. This protocol provides a catalytic method for the synthesis of aryl epoxides in useful yields with high regio- and stereoselectivity directly
我们在此报道了一种通过一锅双催化剂系统实现的芳基烷烃的正式不对称环氧化,该系统包括用于烷烃脱氢-烯烃异构化 (AD-ISO) 的钳形 Ir 催化剂和用于不对称烯烃环氧化的手性酮催化剂。该协议提供了一种催化方法,用于直接从容易获得的烷基芳烃中合成具有高区域和立体选择性的有用产率的芳基环氧化物。环氧化产物的立体特异性衍生允许获得各种对映体富集的化合物。