Azo Coupling in the Pyrrole System. The Synthesis of Azopyrroles

A KREUTZBERGER, PA KALTER

Index: Kreutzberger,A.; Kalter,P.A. Journal of Organic Chemistry, 1961 , vol. 26, p. 3790 - 3796

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Citation Number: 9

Abstract

2, 5-Diphenylpyrrole-3-diazonirlm chloride (SIII) has been shown to undergo the azo coupling reaction leading to the new compound class of azopyrroles (I). Coupling of XI11 with pyrroles carrying substituents in a-positions furnishes 3, 3'-azopyrroles (Ia and Ib), while the coupling products with pyrroles having free a-positions have been assigned the structure of 2, 3'-azopyrroles (IC through Ih). Structure proof of I has been adduced by ...