121909-61-3Relevant articles and documents
A Synthetic Entry into the Quinobenzoxazine Ring System
Aversa, M. C.,Bonaccorsi, P.,Giannetto, P.
, p. 237 - 239 (2007/10/02)
The double ring closure of N-(2-hydroxybenzyl)anthranilic acids 1 with acetic anhydride or its acyclic analogous (RCH2CO)2O 2b and 2e lead to the formation of novel 12H-quinobenzoxazin-5-ones.The structure of the obtained compounds was proved with the use of their ir, mass, 1H and 13C nmr spectra.Homo- and heteronuclear two-dimensional nmr experiments were performed to unambiguously assign all proton and carbon chemical shifts.