25,26-Dialkoxycalix[4]arenes. Part 2: 1-Alkoxy-3-benzoyloxy route
作者:Cheng-Han Kuo、Jun-Ren Huang、Hui-Ru Chen、Pei-Yu Chen、Chien-Hung Lin、Lee-Gin Lin
DOI:10.1016/j.tet.2011.03.048
日期:2011.5
Benzoylation of calix[4]arene monoalkyl ethers with benzoyl chloride yielded the corresponding 3-benzoates and/or 2,3-dibenzoates in different reaction conditions. A simple recrystallization process was able to isolate the 3-benzoates in good yield. In the presence of NaH as reaction base, the 1-alkoxy-3-benzoyloxycalixarenes were alkylated with active alkyl halides at proximal position and yielded the corresponding
25-Alkoxy-26-benzoyloxycalix[4]arenes: the reaction mechanism of benzoyl migration
作者:Lee-Gin Lin、Pi-Guey Su、Jun-Ren Huang、Cheng-Han Kuo、Chien-Hung Lin、Chi-Peng Dai、Tahsin J. Chow
DOI:10.1016/j.tetlet.2012.04.138
日期:2012.7
K2CO3 as reaction base, the 25-alkoxy-27-benzoyloxy-calix[4]arenes were converted into 25-alkoxy-26-benzoyloxy derivatives by benzoyl-migration. A benzoyl-migrated reaction mechanism with a cyclic orthobenzoate-like intermediate was proposed, and the mechanism was supported by the identical reaction results on the conversion of 25-ethoxy-27-benzoyloxycalix[4]arene to 25-ethoxy-26-benzoyloxycalix[4]arene
在K 2 CO 3作为反应碱的存在下,通过苯甲酰迁移将25-烷氧基-27-苯甲酰氧基-杯[4]芳烃转化为25-烷氧基-26-苯甲酰氧基衍生物。提出了具有环状邻苯甲酸酯类中间体的苯甲酰迁移反应机理,该机理得到了相同的反应结果的支持,即25-乙氧基-27-苯甲酰氧基杯[4]芳烃转化为25-乙氧基-26-苯甲酰氧基杯[ 4] arene,反之亦然。