ChemInform Abstract: ELEKTROCHEMIE IN HEXAMETHYLPHOSPHORSAEURETRIAMID 2. MITT. PEROXYDIERUNG DES LOESUNGSMITTELS

Abstract

Unter der Einwirkung von Licht bildet das Triamid in Gegenwart von Sauerstoff an der Hg‐Elektrode ein Peroxid, dem die Formel (I) zugeschrieben wird.

Diversity-Oriented Synthesis of Ketoindoloquinoxalines and Indolotriazoloquinoxalines from 1-(2-Nitroaryl)-2-alkynylindoles

“…These preliminary findings suggest that the reaction may be following a radical pathway where intermediate IV may be getting blocked by the addition of TEMPO . Formation of 2 as a minor product in HMPA in the presence of oxygen alone (metal-free conditions; entry 14) may be attributed to the in situ generation of HMPA peroxide . The latter species may be interacting with the intermediate I to afford 2 ; however, in the absence of any literature precedent involving hydroperoxide-mediated (non-metal-catalyzed) activation of alkynes, this needs detailed investigation.…”