Trifluoromethanesulfonyl azide: an efficient reagent for the preparation of α-cyano-α-diazo carbonyls and an α-sulfonyl-α-diazo carbonyl
摘要:
The reaction scope of trifluorornethanesulfonyl azide in diazo transfer reactions was extended to include the preparation of alpha-cyano-alpha-diazo-carbonyls, phenyl sulfonyl diazoacetophenone and diethyl diazomalonate in high yields. The effect of the bases used in the diazo transfer reactions were found to have a dramatic influence on the success of the reaction with pyridine being the base of choice. (C) 2003 Elsevier Ltd. All rights reserved.