ChemInform Abstract: PYRIDINIUM YLIDES DERIVED FROM PYRYLIUMS AND AMINES AND A NOVEL REARRANGEMENT OF 1‐VINYL‐1,2‐DIHYDROPYRIDINES

Abstract

Pyryliumsalze werden mit Aminen zu Pyridiniumverbindungen umgesetzt.

Nucleophilic displacement of N-aryl and heteroaryl groups. Part 5. Conversion of 2-aminopyridines into 2-pyridones

“…In contrast to the 6-aryl series, the 3-H and 5-H doublets of the 6-t-butyl series absorbed at 6 8. 4…”

Intramolecular reactions of pyridinium-2-carbonyl azides: conversion of amines into aldehydes

“…The mechanism of Scheme 1 is proposed to account for the formation of these products: compound (3) from singlet nitrene which inserts to give the bicyclic compound (5) which can break down by path (a) via (7) to give (10). In addition, a minor proportion of the reaction follows path (b) via (6) and (9) to give (ll), and some nitrile (8) is formed, possibly by o-alkylation of the azide or an intermediate. 2-Carbamoyl-4,6-diphenylpyridine (10) was isolated from the mixture of ether-soluble products and characterized on the basis of its i.r.…”