Carbenoid entry into trifluoromethylated molecules: preparation of functionalized CF3-containing γ, δ -unsaturated carboxylic esters by rhodium-catalyzed reaction of ethyl 3,3,3-trifluoro-2-diazo-propionate with allylic sulfides and their further facile conversion to trifluoromethylated conjugated dienoic esters
作者:Guoqiang Shi、Yuanyao Xu、Ming Xu
DOI:10.1016/s0040-4020(01)96907-8
日期:1991.1
The [2,3]-sigmatropic rearrangement of sulfonium ylides derived from rhodium-catalyzed decomposition of ethyl 3,3,3-trifluoro-2-diazopropionate in the presence of allylic sulfides affords a variety of functionalized CF3-containing γ , δ-unsaturated carboxylic esters which have been further converted to synthetically useful trifluoromethylated dienoic esters via the dehydrosulfenylation sequence. For
在烯丙基硫醚的存在下,铑在3,3,3-三氟-2-重氮丙酸乙酯催化下的铑分解反应生成of的[2,3]-σ重排,可提供多种功能化的含CF 3的γ,δ-不饱和羧酸酯,它们已经通过脱氢磺酰化顺序进一步转化为合成上有用的三氟甲基化的二烯酸酯。对于合成应用,合成了新型氟化类维生素A。