Synthesis of 2-aryl-5H-[1,3,4]-thiadiazolo[2,3-b]quinazolin-5-ones |
| |
Authors: | V. N. Britsun A. N. Esipenko M. O. Lozinskii |
| |
Affiliation: | (1) Institute of Organic Chemistry, Ukraine National Academy of Sciences, Kiev, 02094, Ukraine |
| |
Abstract: | 3-Amino-2-thioxo-1,2,3,4-tetrahydroquinazolin-4-ones were converted into 2-aryl-5H-[1,3,4]thiadiazolo[2,3-b]quinazolin-5-ones on treatment with carboxylic acids and POCl3. 3-Arylmethylidenamino-2-thioxo-1,2,3,4-tetrahydroquinazolin-4-ones also cyclized to 2-aryl-5H-[1,3,4]thiadiazolo[2,3-b]quinazolin-5-ones when oxidized with potassium chlorate in acetic acid, but on heating they were deaminated to give 2-thioxo-1,2,3,4-tetrahydroquinazolin-4-one and aryl nitriles. __________ Translated from Khimiya Geteotsiklicheskikh Soedinenii, No. 5, 787–791, May, 2006. |
| |
Keywords: | 3-amino-2-thioxo-1,2,3,4-tetrahydroquinazolin-4-one 3-arylmethylidenamino-2-thioxo-1,2,3,4-tetrahydroquinazolin-4-ones aryl nitriles 2-aryl-5H-[1,3,4]thiadiazolo[2,3-b]quinazolin-5-ones 2-thioxo-1,2,3,4-tetrahydroquinazolin-4-one potassium chlorate deamination cyclization |
本文献已被 SpringerLink 等数据库收录! |
|