Trifluoro‐3‐hydroxy‐1H‐indazolecarboxylic Acids and Esters from Perfluorinated Benzenedicarboxylic Acids

Abstract

Twelve new 3-hydroxyindazoles, each bearing three fluorine substituents and a CO 2 R group (R = H, CH 3 , C 2 H 5 ) distributed around its 4-, 5-, 6-, and 7-positions, have been synthesized. They were studied by NMR in solution (