Azines and azoles: CXXIV. New synthesis of 2-oxochromene-3-carboxamides

Shutov, Roman V.; Kaluzhskikh, A. N.; Moskvin, A. V.; Ivin, B. A.

doi:10.1134/s1070363206050252

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Cited by 5 publications

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“…As an exception, formaldehyde reacted to give 5,5′‐methanediylbis(4‐hydroxy‐2‐aryl‐6 H ‐1,3‐thiazin‐6‐ones), just as it was previously shown by Ziegler , and no further cyclization was observed upon its heating in various conditions (py, DMF, THF, and AcOH). The other exception was salicylaldehyde, and by virtue of 2‐hydroxygroup, it reacts with thiazines 4 to give coumarin derivatives, as we have shown previously .…”

Section: Resultsmentioning

confidence: 56%

Synthesis of 2,5-Disubstituted Derivatives of Pyrano[2,3-d][1,3]thiazines via the Interaction of 2-Substituted 4-Hydroxy-6H-1,3-thiazine-6-ones with Aldehydes

Shutov

Sopova

Крылов

et al. 2014

J. Heterocyclic Chem.

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A new and efficient route for the synthesis of derivatives of the poorly investigated pyrano[2,3‐d][1,3]thiazine heterocyclic system is disclosed. These compounds were prepared via annulation of 2‐aryl‐4‐hydroxy‐6H‐1,3‐thiazine‐6‐ones with aliphatic and aromatic aldehydes in the presence of pyridine. The method is general and versatile, and the interaction is independent on the nature of the aldehyde, the only exceptions being formaldehyde and salicylaldehydes.

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Section: Resultsmentioning

confidence: 56%