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Communication | Regular issue | Vol 12, No. 4, 1979, pp.493-495
Published online, 1st January, 1970
DOI: 10.3987/R-1979-04-0493
Synthesis of New Fundamental Heterocycles IX. Synthesis of 2H-Pyrano[3,2-b]pyridine

Henri Sliwa* and Klaus Peter Krings

*Laboratoire de Chimie Organique et Environnement, Université des Sciences et Technologies de Lille, Bat. C4 -2eme Etage, 59655 Villeneuve d‘ Ascq Cedex, France

Abstract

Reductive ring opening of 5-aza-2-chromanol hydrochloride (6) followed by ring closure afforded 5-azachroman (9) which has been converted to the fundamental parent heterocycle (3) through acetoxylation of its N-oxide and subsequent pyrolysis.