- SYNTHESIS OF 2-ALKYLTHIOQUINAZOL-4-ONES
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Alkylation of 2-thioxoquinazol-4-one by different alkylating agents was studied, and it was found that the reaction proceeds at the exocyclic sulfur atom with the formation of 2-alkylthioquinazol-4-ones.
- Yun, L. M.,Yangibaev, S.,Shakhidoyatov, Kh. M.,Alekseeva, V. Ya.,V'yunov, K. A.
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p. 214 - 216
(2007/10/02)
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- o.FORMYLARYLAZOMETHYLENETRIPHENYLPHOSPHORANES: A FACILE THERMALLY PROMOTED REARRANGEMENT TO 3-OXO-INDAZOLINE AND 4-OXO-DIHYDROQUINAZOLINE DERIVATIVES
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The o.formylarylazomethylenetriphenylphosphoranes carrying an electron withdrawing group on the ylidic carbon undergo thermal intramolecular cyclization to 3-oxo-indazolin-2-yl-methylenephosphorane derivatives.The latter compounds, and their 1-alkyl derivatives, in turn, undergo thermal and/or acid catalyzed rearrangement to 4-oxo-1,4-dihydroquinazoline derivatives and PPh3.Some possible reaction mechanisms are discussed, and some synthetic applications of the above reactions are shown.
- Alemagna, A.,Buttero, P. del,Licandro, E.,Maiorana, S.,Papagni, A.
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p. 3321 - 3330
(2007/10/02)
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- SYNTHESIS AND ALKYLATION OF 2-MERCAPTO-4-QUINAZOLONE AND THE FUNGICIDAL ACTIVITIES OF THE COMPOUNDS OBTAINED
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A convenient method of obtaining 2-mercapto-4-quinazolone has been developed and the alkylation of its ambidentate anions has been studied.It has been found that they exhibit a dual reactivity in alkylation reactions.It has been shown that alkylated 2-mercapto-4-quinazolones possess a moderate fungicidal activity.
- Shakhadoyatov, Kh. M.,Yangibaev, S.,Yun, L. M.,Kadyrov, Ch. Sh.
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p. 106 - 111
(2007/10/02)
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