作者:Tooru Fujiwara、Takeshi Takeda
DOI:10.1055/s-1999-2618
日期:1999.3
The low-valent titanium species-promoted transformation of unsaturated thioacetals to cyclic compounds was studied. The cyclization of thioacetals having an olefin moiety proceeded with the loss of terminal olefin carbon to produce the corresponding five-, six-, and seven-membered cycloalkenes when they were treated with the low-valent titanium species Cp2Ti[P(OEt)3]2 in refluxing THF. The similar reactions of 1-[3,3-bis(phenylthio)propoxy]-2-(prop-1- and prop-2-enyl)benzenes gave the seven- and eight-membered unsaturated cyclic ethers, respectively.
研究了低价钛物种促进不饱和硫代乙醛向环状化合物的转化。当具有烯烃分子的硫代乙醛在回流四氢呋喃中被低价钛金属 Cp2Ti[P(OEt)3]2 处理时,其环化反应在失去末端烯烃碳的情况下进行,生成相应的五元、六元和七元环烯烃。1-[3,3-双(苯硫基)丙氧基]-2-(丙-1-和丙-2-烯基)苯的类似反应分别生成了七元和八元不饱和环醚。