1178530-53-4Relevant articles and documents
Synthesis of 3-(Tosylalkyl)indazoles and their desulfonylation reactions a new entry to 3-substituted indazoles by an unprecedented friedel-crafts process
Campetella, Silvia,Palmieri, Alessandro,Petrini, Marino
experimental part, p. 3184 - 3188 (2009/12/07)
Reaction of indazoles with aldehydes in the presence of ptoluenesulfinic acid affords the corresponding sulfonyl indazoles in satisfactory yields. The reported Friedel-Crafts process is rather unusual on indazoles because of the reduced electronic density