Pseudo-cross-conjugated mesomeric betaines and N-heterocyclic carbenes of indazole

A Schmidt, A Beutler, T Habeck, T Mordhorst…

Index: Synthesis, , # 11 p. 1882 - 1894

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Citation Number: 3

Abstract

... Scheme 3 Synthesis of mesomeric betaine 5. ... of intensely colored compounds which were chromatographically inseparable (Scheme [4] ). This approach to synthesize the 5 ... According to a patent, 19b was already synthesized by reaction of 1,2-dimethyl-3-chloroindazolium salts ...