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
Intramolecular nucleophilic acyl substitution reactions mediated by reagent. Synthesis of vinyltitanium compounds having a lactone and/or an ester group from acetylenic carbonates
作者:Aleksandr Kasatkin、Sentaro Okamoto、Fumie Sato
DOI:10.1016/0040-4039(95)01207-x
日期:1995.8
carbonates of acetylenic alcohols reacted with diisopropoxy(η2-propene)titanium to give the alkenyltitanium compounds containing lactone ring and/or an estergroup by intramolecular nucleophilic acyl substitution reaction. Condensation of the reaction products with aldehydes afforded substituted butenolides.