共查询到20条相似文献,搜索用时 0 毫秒
1.
Starting from readily available pyroglutamic esters 1 , some new 1,3,4-oxadiazole-2-thione derivatives, bonded to a pyrrolidinone ring were synthesised and characterised by their spectral data. 相似文献
2.
2-Methyl-5-(5-oxo-1-benzyl-2-pyrrolidinyl)-1,3,4-oxadiazole is easily obtained by dehydration of N-acetyl-1-benzylpyroglutamic acid hydrazide with a methanesulfonic acid/phosphoric anhydride mixture. 相似文献
3.
Studies on pyrrolidinones. Synthesis of 5-(5-oxo-2-pyrrolidinyl)-1,2,4-triazole-3-thione derivatives
Starting from readily available pyroglutamic esters 1 , some new 1,2,4-triazole-3-thione derivatives, bonded to a pyrrolidinone ring were synthesized and are characterized by their spectral data. 相似文献
4.
2-三氟苯甲酰肼与芳酰氯反应制得N,N′-二酰肼(2)。2在三氯氧磷存在下脱水闭环,合成了一系列2-(2-三氟苯基)-5-芳基-1,3,4-噁二唑类化合物,其结构经1H NMR,IR,MS和元素分析表征。 相似文献
5.
6.
7.
The interaction of 2-amino-1,3,4-oxadiazole-5-carboxamidoxime with nitriles in the presence of ZnCl2 and HCl or with trichloroacetic anhydride affords 2-amino-5-(5R-1,2,4-oxadiazolyl-3)-1,3,4-oxadiazoles. Their reactions with N-nucleophiles have been studied.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2100–2103, December, 1993. 相似文献
8.
2-芳基-5-(6-哒嗪酮-3-基)-1,3,4-噁二唑的合成 总被引:1,自引:0,他引:1
1,4,5,6-四氢-6-哒嗪酮-3-甲酰肼(1)和1,6-二氢-6-哒嗪酮-3-甲酰肼(2)与芳香醛反应得到相应的芳香醛腙3a~3g和5a~5g, 再将3a~3g, 5a~5g在溴的作用下, 合环得到一系列1,3,4-噁二唑的衍生物4a~4g和6a~6g. 化合物的结构经1H NMR, IR, MS和元素分析得以证实. 相似文献
9.
10.
G. G. Danagulyan N. G. Balasanyan M. G. Zalinyan 《Chemistry of Heterocyclic Compounds》1993,29(11):1328-1331
(2-Oxo-1-pyrrolidinyl)pyrimidines have been synthesized by thermal cyclization of certain N-(pyrimidinyl)--aminobutyric acids. Reaction of 2-methyl-4-chloro-6-(2-oxo-1-pyrrolidinyl)pyrimidine with the sodium salts of acetone or acetophenone oximes gave the corresponding pyrimidinylketoximes. The iodomethylation of pyrrolidinylpyrimidines is reported.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1540–1544, November, 1993. 相似文献
11.
Several 2-alkyl-5-(4-biphenylyl)-1,3,4-oxadiazoles have been synthesized and investigated as primary liquid scintillation solutes and are found to be excellent fluors. Fluorescence studies at varying concentrations and temperatures indicate that excimer formation is possible at high concentration and low temperatures. 相似文献
12.
Mikhailov I. E. Artyushkina Yu. M. Dushenko G. A. Minkina V. I. 《Russian Chemical Bulletin》2020,69(1):176-178
Russian Chemical Bulletin - 2-Aryl-5-methyl-1,3,4-oxadiazoles were synthesized by reflux of equimolar amounts of acyl hydrazides with triethyl orthoacetate in o-xylene. The obtained oxadiazoles,... 相似文献
13.
14.
15.
2-芳氧基-5-苯基-1,3,4-恶二唑类化合物的合成 总被引:1,自引:0,他引:1
通过芳氧基负离子在2-甲磺酰基-5-1,3,4-恶二唑上的亲核取代反应制得2-芳氧基-5-苯基-1,3,4-恶二唑.所有化合物的结构经元素分析,IR, ^1H NMR和MS确证.这些化合物表现出一定的抑制枯草芽孢杆菌繁殖的活性. 相似文献
16.
17.
L. D. Patsenker V. K. Polyakov A. P. Shkumat V. F. Lavrushin V. D. Bezuglyi 《Chemistry of Heterocyclic Compounds》1986,22(11):1255-1258
The polarographic behavior of 5-aryl-2-(2-thienyl)oxazoles and -1,3,4-oxadiazoles has been studied.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1550–1552, November, 1986. 相似文献
18.
Feng Liu Meiyan Wang Xinhuan Teng Peizhi Zhang Lin Jiang 《Research on Chemical Intermediates》2014,40(4):1575-1581
A series of 2-(5-methyl-3-(4-chloro/trifluoromethylphenyl)isoxazol-4-yl)-5-arylamino-1,3,4-oxadiazoles were synthesized from 4-chloro/trifluoromethyl benzaldehyde, ethyl acetoacetate, hydroxylamine hydrochloride, hydrazine hydrate, and aryl isocyanate by multi-step reactions. The structures of the target compounds were elucidated by IR, 1H NMR, MS, and elemental analysis. All these compounds were tested for in vitro antifungal activities against Botrytis cinerea and Rhizoctonia cerealis by the mycelium growth rate method, and the results indicated that some compounds displayed high antifungal activity against Botrytis cinerea. 相似文献
19.
20.
Demina M. M. Sarapulova G. I. Borisova A. I. Larina L. I. Medvedeva A. S. 《Russian Journal of Organic Chemistry》2003,39(10):1522-1524
5-Trimethylsilylethynyl-2-R-1,3,4-oxadiazoles were synthesized for the first time by intramolecular cyclocondensation of unsymmetrical N-acyl-N'-(3-trimethylsilyl-2-propynoyl)hydrazines by the action of phosphoryl chloride. 相似文献