Trapping of Azidocarbenium Ion: A Unique Route for Azide Synthesis
作者:Suman Pramanik、Prasanta Ghorai
DOI:10.1021/ol5008235
日期:2014.4.18
the first time, a sensitive azidocarbenium ionintermediate has been trapped with various nucleophiles to provide azides in excellent chemoselectivity. This provides a novel approach for the chemoselective synthesis of primary and secondary benzyl azides from aldehydes in a one-pot reaction. Enantioselective nucleophilic addition to the azidocarbenium ion has also been initiated.
On treatment with an excess of sodium azide in the presence of titanium(IV) chloride in boiling acetonitrile, both aliphatic and aromatic ketones are smoothly converted to 1,5-disubstituted 1H-tetrazoles in high yields.