66117-79-1Relevant articles and documents
Electron Deficient Heteroaromatic Ammonioamidates. Part 24. N-(Quinazolin-3-io)amidates. Part 11. The Photochemistry of N-(6,7-Methylenedioxyquinazolin-3-io)amidates in Acetone
Batra-Szalai, Gisella,Fetter, Jozsef,Lempert, Karoly,Moeller, Joergen,Parkanyi, Laszlo
, p. 2003 - 2009 (2007/10/02)
N-(Quinazolin-3-io)amidates (1) may exist, depending on the nature of the groups R, R1, and R2, and in the absence of nucleophiles, as equilibrium mixtures of the monomeric (1) and dimeric (3) forms.For the first time evidence has been found for the generation of photoproducts of the dimeric forms (3) via irradiation of the quinazolinioamidates (1a-c) in acetone in which substantial amounts of the dimers (3a-c) are present.Thus, the quinazolinioamidates (1) are the only heteroaromatic ammonioamidates which are known not only to exist in three forms, viz. the monomer, the adducts (2), and the dimers (3), but also to furnish characteristic photoproducts of all three forms.
ELECTRON DEFICIENT HETEROAROMATIC AMMONIOAMIDATES, PART 22. N-(3-QUINAZOLINIO)AMIDATES, PART 10. Thermolysis of N-(2,4-dimethyl-6,7-methylenedioxy-3-quinazolinio)ethoxyformamidate and of ethyl N-(2-methyl-4-methylene-6,7-methylenedioxy-3,4-dihydro-3-quinazolinyl)-N-phenylcarbamate.
Bertha, P.,Fetter, J.,Lempert, K.,Moeller, J.,Radics, L.
, p. 4737 - 4744 (2007/10/02)
N-(2,4-Dimethyl-6,7-methylenedioxy-3-quinazolinio)ethoxyformamidate (1b), upon prolonged refluxing in dioxane, furnished mixtures of the quinazoline derivatives 3b, 4, 5 and 6, and ethyl carbamate; in butanol compound 4 was formed as the sole thermolysis product.N-(2-Methyl-4-methylene-6,7-methylenedioxy-3,4-dihydro-3-quinazolinyl)-N-phenylcarbamate (2c) was transformed on refluxing in dioxane into mixtures of its two isomers 3c and 7.Possible modes of formation of these products are discussed, and the results of the thermolyses are compared with those of the photolyses of compounds 1b and 2c described earlier.
