2005

Fused pyridine derivativesR 0450 Unexpected Oxidation of Azafluoren-9-ones under Baeyer—Villiger Conditions.

— The oxidation of 1-azafluoren-9-one (I) under modified Baeyer—Villiger conditions (A) affords unexpectedly the corresponding N-oxide (II) instead of the expected lactone (III). Analogous mild oxidation of 4-azafluoren-9-one (IV) as well as oxidation under conventional Baeyer—Villiger conditions (B) gives the N-oxide (V) in both cases. — (ANH, L. T.; VOLKOV, S. V.; POLYANSKI, K. B.; SOLDATENKOV, A. T.; Chem. Heterocycl. Compd. (N. Y.) 40 (2004) 11, 1508-1509; Russ. Peoples' Friendship Univ., Moscow 117198, Russia; Eng.) — C. Hettrich

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