Synthesis of 2-vinyl-2H-benzotriazoles via NIS-promoted regio/stereoselective addition of 1H-benzotriazole to alkynes
作者:Zhenhua Zhang、Lina Chang、Shaozhong Wang、Huaqin Wang、Zhu-Jun Yao
DOI:10.1039/c3ra43075h
日期:——
A regio/stereoselective electrophilicaddition of 1H-benzotriazole to aromatic alkynes induced by N-iodosuccinimide (NIS) has been achieved, providing unique access to 2-vinyl-2H-benzotriazole derivatives. It was demonstrated that the stereoselectivity is controlled by the nature of the substituents attached to the alkyne terminus. A mechanism involving cyclic iodonium and vinyl cation intermediates