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
哈格曼酯可以转化为高度官能化的酚类或芳烃。Hagemann 酯衍生物的系统功能化允许制备三和四烷基取代的苯酚或四、五和六烷基取代的苯。发现 Kotnis 的芳构化程序依赖于溶剂,并且发现 Suzuki 偶联对空间位阻敏感。Wittig 烯化和邻-克莱森反应是分别在 C-4 和/或 C-5 位置引入烷基取代基的可靠方法。酸促进的叔醇 46 脱水生成烯酮 47,然后选择性烷基化(参见 48)是新的。