Intramolecular Nucleophilic Acyl Substitution Reactions Mediated by XTi(O-<i>i</i>-Pr)<sub>3</sub> (X = Cl, O-<i>i</i>-Pr)/2<i>i-</i>PrMgBr Reagent. Efficient Synthesis of Functionalized Organotitanium Compounds from Unsaturated Compounds
作者:Sentaro Okamoto、Aleksandr Kasatkin、P. K. Zubaidha、Fumie Sato
DOI:10.1021/ja953497z
日期:1996.1.1
readily generated by the reaction of Ti(O-i-Pr)4 or ClTi(O-i-Pr)3 with 2i-PrMgX, resulted in an intramolecular nucleophilic acyl substitution (INAS) reaction to afford organotitanium compounds having a carbonyl functional group, in good to excellent yields. Thus, the treatment of alkyl alkynyl carbonates 2 or alkyl alkenyl carbonates 4 with 1 gave organotitanium compounds having a lactone and/or ester
用低价钛试剂二异丙氧基(η2-丙烯)钛 (1) 处理炔属或烯属碳酸酯和酯,该试剂很容易通过 Ti(Oi-Pr)4 或 ClTi(Oi-Pr)3 与 2i- PrMgX 导致分子内亲核酰基取代 (INAS) 反应以提供具有羰基官能团的有机钛化合物,产率良好至极好。因此,用1处理烷基炔基碳酸酯2或烷基链烯基碳酸酯4得到具有内酯和/或酯基团的有机钛化合物。类似地,羧酸的烷基炔酸酯 10 或炔基酯 14 与 1 反应,分别得到具有环状或无环酮基团的有机钛化合物。因此,该反应在水解后提供来自 2 的五元或六元 α-亚烷基内酯和/或 α,β-不饱和酯,