Development of regioselective [2 + 3] cycloaddition reactions of nitrile oxides with alkenes using intramolecular reactions through oxime groups [1]
作者:Nao Umemoto、Ayumi Imayoshi、Kazunori Tsubaki
DOI:10.1016/j.tet.2022.132833
日期:2022.8
oxime group and demonstrated their intramolecular [2 + 3] cycloaddition reactions. The desired cycloadducts were obtained in high yields and as single regioisomers. Furthermore, face-selective cycloaddition reactions were achieved by introducing a stereocenter into the linker moiety, affording the desired cycloadducts with good diastereoselectivity.
A one-pot synthesis of trifluoromethylated α,β-unsaturated esters
作者:Yanchang Shen、Yuejun Xiang
DOI:10.1016/s0022-1139(00)80137-2
日期:1991.4
Trifluoromethylated alpha,beta-unsaturated esters were conveniently synthesized by reaction of organolithium compounds with a fluorinated biscarbonylphosphonium salt which was prepared in situ by acylation of the corresponding phosphorane with trifluoroacetic anhydride.