Synthesis and conversions of 6-nitro derivatives of 1,3,4-thiadiazolo[3,2-a]pyrimidines
作者:M. A. Kukaniev、U. Nurov、S. Sh. Shukurov、Yu. Khodzhibaev
DOI:10.1007/bf02496018
日期:1999.6
Convenient procedures were developed for the preparation of new 2-R-thio and 2-amino derivatives of 7-methyl-6-nitro-5-oxo-5H-1,3,4-thiadiazolo[3,2-a]pyrimidines and products of their condensation with aldehydes.
Selenium heterocycles. XV. Reaction of 2-aminoselenazoles and 2-amino-1,3,4-selenadiazoles with acetylenic compounds
作者:A. Shafiee、I. Lalezari
DOI:10.1002/jhet.5570120413
日期:1975.8
2-Aminoselenazoles with ethyl propiolate or dimethyl acetylenedicarboxylate gave 7H-selenazolo[3,2-a]pyrimidin-7-ones. 2-Amino-1,3,4-selenadiazoles with dimethyl acetylenedicarboxylate gave 7H-1,3,4-selenadiazolo[3,2-a]pyrimidin-7-ones; with ethyl propiolate the reaction took an unusual path and 2-carbethoxy-5H-selenazolo[3,2-a]pyrimidin-5-one was isolated. The assignment of the structures were supported
用丙酸乙酯或乙炔二甲酸二甲酯的2-氨基硒唑得到7 H-硒代氮杂[3,2 - a ]嘧啶-7-酮。2-氨基-1,3,4-硒代二唑与乙酰二羧酸二甲酯得到7 H -1,3,4-硒代重氮[3,2 - a ]嘧啶-7-;用丙酸乙酯反应时,反应路线不寻常,分离出2-甲乙氧基-5 H-硒代苯并[3,2 - a ]嘧啶-5-酮。光谱分析支持结构的分配。
Reaction of .beta.-oxo esters with 2-amino-1,3,4-thiadiazoles. A reinvestigation
作者:Gabriel Kornis、Pamela J. Marks、Constance G. Chidester
DOI:10.1021/jo01312a012
日期:1980.11
Ohta et al., Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1951, vol. 71, p. 1481,1483
作者:Ohta et al.
DOI:——
日期:——
KORNIS G.; MARKS P. J.; CHIDESTER C. G., J. ORG. CHEM., 1980, 45, NO 24, 4860-4863