ChemInform Abstract: Intramolecular 1,3‐Dipolar Cycloaddition of Alkyl Azidoalkylidenemalonate and 1,3‐Dipolar Cycloreversion of the Triazoline Intermediate: Synthesis and Reactions of an N‐Sulfonyl‐2,4‐dihydropyrrolo(3,4‐b)indole.

Abstract

The dihydropyrroloindole (V) and its ester (VII) are prepared from the indole (I), the key steps being the intramolecular 1,3‐dipolar cycloaddition of the azide derived from (III) and the 1,3‐dipolar cycloreversion of the triazoline (IV).