Synthesis

Syntheses of formazans under phase-transfer conditions

AA Katritzky, SA Belyakov, D Cheng, HD Durst

文献索引：Katritzky; Belyakov; Cheng; Durst Synthesis, 1995 , # 5 p. 577 - 581

全文：HTML全文

被引用次数: 39

摘要

Several 1, 3, 5-triarylformazans were synthesized (42—77%) using a new methodology. Azo- coupling of aryldiazonium salts with arylaldehyde arylhydrazones under mild basic conditions in two-phase liquid-liquid media is efficiently promoted by phase-transfer catalysts (onium salts or dicyclohexano-18-crown-6) at 5-25 C'C. The condensation of benzaldehyde with phenylhydrazine followed by phase-transfer catalyzed azo-coupling ...