Synthesis of aminopyrazoles from sydnones and ynamides
作者:T. Wezeman、J. Comas-Barceló、M. Nieger、J. P. A. Harrity、S. Bräse
DOI:10.1039/c6ob02518h
日期:——
Aminopyrazoles are prepared from readily accessible sydnones and sulfonyl ynamides using either a copper-mediated sydnone alkyne cycloaddition (CuSAC) or in situ generated strained cyclic ynamides.
<i>N</i>-Tosyl-3-Azacyclohexyne. Synthesis and Chemistry of a Strained Cyclic Ynamide
作者:Sami F. Tlais、Rick L. Danheiser
DOI:10.1021/ja509055r
日期:2014.11.5
The first synthesis of a strained six-membered cyclic ynamide is described. N-Tosyl-3-azacyclohexyne is generated via fluoride-promoted 1,2 elimination under conditions that allow trapping of the strained heterocyclic alkyne in a variety of addition, insertion, and [2 + 2], [3 + 2], and [4 + 2] cycloaddition reactions.