Heterocyclization of functionalized heterocumulenes with C,N-, C,O-, and C,S-binucleophiles: VIII. Synthesis of pyrano(chromeno)[3,4-e][1,3]oxazines by condensation of 1-chloroalkyl isocyanates with 4-hydroxy-6-methylpyran-2-one and 4-hydroxycoumarin

Autor:	M. V. Vovk, Volodymyr A. Sukach, V. I. Dorokhov
Rok vydání:	2007
Předmět:	chemistry.chemical_classification 4-Hydroxycoumarin Chemistry Organic Chemistry Condensation Oxazines Medicinal chemistry
Zdroj:	Russian Journal of Organic Chemistry. 43:1186-1189
ISSN:	1608-3393 1070-4280
DOI:	10.1134/s1070428007080179
Popis:	1-Chlorobenzyl isocyanates react with 4-hydroxy-6-methylpyran-2-one and 4-hydroxycoumarin forming 4-aryl-3,4-dihydro-2H,5H-pyrano(chromeno)[3,4-e][1,3]oxazine-2,5-diones. The reaction of 1-aryl-2,2,2-trifluoro-1-chloroethyl isocyanates with the above substrates gives rise to structurally isomeric 2-aryl-2-trifluoromethyl-2,3-dihydro-2H,5H-pyrano(chromeno)[3,4-e][1,3]-oxazine-4,5-diones.
Databáze:	OpenAIRE
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