Kinetics and mechanism of the hydrolysis of tetrahydro-2-furyl and tetrahydropyran-2-yl alkanoates
作者:C. Dennis Hall、Vu Truong Le
DOI:10.1039/a708422f
日期:——
ethanol are reported. In acidic and neutral media, kinetics, activation parameters, 18O isotope exchange studies, substituent effects, solvent effects and the lack of buffer catalysis point clearly to an AA1-1 mechanism with formation of the tetrahydro-2-furyl or tetrahydropyran-2-yl carbonium ion as the rate-limiting step. There is no evidence of a base-promoted BAC-2 mechanism up to pH 12.
据报道,在水和水–20%乙醇中,四氢-2-呋喃基和四氢吡喃-2-基链烷酸酯的水解动力学和机理。在酸性和中性介质中,动力学,激活参数,18氧同位素交换的研究中,取代基的影响,溶剂效应以及缺乏缓冲催化点的明确给A A1 -1机构与形成四氢-2-呋喃基或四氢吡喃-2- -基碳鎓离子作为限速步骤。没有证据表明pH高达12时,碱促进的B AC -2机制。