Synthesis of 1,3,5-trisubstituted pyrazolines via Zn(ii)-catalyzed double hydroamination of enynes with aryl hydrazines
作者:Nitin T. Patil、Vipender Singh
DOI:10.1039/c1cc14850h
日期:——
An efficient Zn(II)-catalyzed intermolecular double hydroamination of 1,3-enynes with aryl hydrazines, for the synthesis of pyrazolines, has been discussed.
Zinc-mediated enantioselective addition of terminal 3-en-1-ynes to cyclic trifluoromethyl ketimines
作者:Yue Zhang、Jing Nie、Fa-Guang Zhang、Jun-An Ma
DOI:10.1016/j.jfluchem.2018.01.008
日期:2018.4
A facile enantioselectiveaddition of terminal 3-en-1-ynes to cyclic N-acyl trifluoromethyl ketimines is reported. In the presence of Zinc/BINOL complexes, a series of enynylated tertiary carbinamines were readily obtained in 90–97% yield with 70–97% enantiomeric excess in a single chemical operation under mild reaction conditions.
The title iododienes have been prepared from 6-phenylhex-3-en-yne by the addition of methylmagnesiumtributyltin, followed by reactions of stannylmagnesium intermediate Awith appropriate electrophiles and of the resulting alkylated stannylidiene Bwith iodine.
标题碘二烯由 6-苯基己-3-烯-炔通过添加甲基三丁基锡镁,然后甲锡烷基镁中间体 A 与适当的亲电子试剂反应以及所得烷基化甲锡烷基 B 与碘反应来制备。