An Interrupted Schmidt Reaction: C–C Bond Formation Arising from Nitrilium Ion Capture
作者:Manwika Charaschanya、Kelin Li、Hashim F. Motiwala、Jeffrey Aubé
DOI:10.1021/acs.orglett.8b02531
日期:2018.10.19
The rerouting of the nitrilium ion formed in the Schmidt reaction of ketones and TMSN3 to encompass C–C bond formation with an electron-rich aromatic group is reported. Thus, when the reaction is carried out in HFIP using AlCl3 or AlBr3 as the promoter, imines, iminium ions, or enamide derivatives are obtained through one-pot procedures. The scope and possible mechanisms of these new transformations
Preparation of 1,5‐Fused Tetrazoles Under Solvent‐Free Conditions
作者:Hossein Eshghi、Asadollah Hassankhani
DOI:10.1081/scc-200054219
日期:2005.4.1
Abstract A facile and efficient procedure is developed for a one‐pot synthesis of fused 1,5‐disubstituted tetrazoles from cyclic ketones and sodium azide in the presence of aluminum chloride in solvent‐free media. Advantages of this method are chemoselectivity, with high yields in a simple operation, and short reaction time under solvent‐free conditions.
Remodeling and Enhancing Schmidt Reaction Pathways in Hexafluoroisopropanol
作者:Hashim F. Motiwala、Manwika Charaschanya、Victor W. Day、Jeffrey Aubé
DOI:10.1021/acs.joc.5b02764
日期:2016.2.19
The effect of carrying out two variations of the Schmidt reaction with ketone electrophiles in hexafluoroisopropanol (HFIP) solvent has been studied. When TMSN3 is reacted with ketones in the presence of triflic acid (TfOH) promoter, tetrazoles are obtained as the major products. This observation is in contrast to established methods, which usually lead to amides or lactams arising from formal NH insertion