Titanocene(II)-promoted reaction of gem-dihalides possessing a terminal double bond. New intramolecular cyclopropanation
作者:Tooru Fujiwara、Miho Odaira、Takeshi Takeda
DOI:10.1016/s0040-4039(01)00465-8
日期:2001.5
The Cp2Ti[P(OEt)3]21-promoted intramolecular reaction of gem-dihalides possessing a terminal double bond is described. The treatment of 6,6- and 7,7-dihalo-1-alkenes with 1 produced bicyclo[3.1.0]hexane and bicyclo[4.1.0]heptane derivatives, respectively.
描述了具有末端双键的宝石-二卤化物的Cp 2 Ti [P(OEt)3 ] 2 1促进的分子内反应。的6,6-和7,7-二卤代-1-烯烃与处理1个分别制备双环[3.1.0]己烷和双环[4.1.0]庚烷衍生物。
Ring-Closing Metathesis of Titanium–Carbene Complexes Prepared from Thioacetals Having a Carbon–Carbon Double Bond
作者:Tooru Fujiwara、Yoshiko Kato、Takeshi Takeda
DOI:10.1016/s0040-4020(00)00201-5
日期:2000.7
The ring-closing metathesis proceeded to give cycloalkenes in good yields when diphenyl thioacetals having a carbon-carbon double bond were treated with the low-valent titanium species Cp2Ti[P(OEt)(3)](2) in THF at room temperature and then at reflux. This methodology is successfully applied to the preparation of cyclic ethers and sulfides. (C) 2000 Published by Elsevier Science Ltd.