共查询到20条相似文献,搜索用时 15 毫秒
1.
SincethesynthesisandherbicidalactivityofDPX-4l89wasreportedinl98o,awidevarietyofsulfonylureaswithimprovedselectivityand/oreffectivenesshavebeendeveloped'-'.Inacontinuingstudyonthesynthesisandherbicidalactivityofthiophenesulfonylureaandsubstitutedbenzenesulfonylureaderivatives'-',wehavefoundthatsulfonylureaherbicideshaveexcellentherbicidalactivityagainstawiderangeofweeds,butmostofthemwerenotselectivelyactiveherbicides.Inthispaperwedescribethesynthesisandherbicidalactivityofthirteen3-benzoly-l-… 相似文献
2.
将取代色满酮(1)与芳肼反应生成的腙与HNCO发生[3+2]环加成反应,加成产物(2)经氧化得到偕偶氮异氰酸酯(3).化合物3在HBF4的催化下发生环化-重排反应,得到新颖的三环系2-氧代-1,2,4-三唑并[3,2-d][1,5]苯并氧氮杂(艹卓 )化合物5a~5g. 相似文献
3.
N. D. Abramova B. V. Trzhtsinskaya Yu. M. Skvortsov A. G. Mal'kina A. I. Albanov G. G. Skvortsova 《Chemistry of Heterocyclic Compounds》1982,18(8):800-802
1,2,4-Triazolo[3,2-b]-1,3-thiazines were obtained by the reaction of 1,2,4,-triazole-3-thiones with an equimolar amount of 1-phenyl-2-cyanoacetylene in the presence of triethylamine or potassium hydroxide. It is shown that triazolethiones form N,S diadducts upon reaction with a twofold excess of cyanoacetylene. The nature of the heteroatom in the exo position of the heteroring affects the direction of addition to phenylcyanoacetylene. 2,4-Bis(1-phenyl-2-cyanovinylene)-1,2,4-triazol-3-one was synthesized.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1051–1053, August, 1982. 相似文献
4.
将取代色满酮 ( 1 )与芳肼反应生成的腙与 HNCO发生 [3 +2 ]环加成反应 ,加成产物 ( 2 )经氧化得到偕偶氮异氰酸酯 ( 3 ) .化合物 3在 HBF4 的催化下发生环化 -重排反应 ,得到新颖的三环系 2 -氧代 -1 ,2 ,4-三唑并[3 ,2 -d][1 ,5 ]苯并氧氮杂化合物 5 a~ 5 g 相似文献
5.
将取代色满酮(1)与芳肼反应生成的腙与HNCO发生[3+2]环加成反应,加成产物(2)经氧化得到偕偶氮异氰酸酯(3).化合物3在HBF4的催化下发生环化-重排反应,得到新颖的三环系2-氧代-1,2,4-三唑并[3,2-d][1,5]苯并氧氮杂化合物5a~5g. 相似文献
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By the reaction of 3,5-dibromo-1-(thiiran-2-ylmethyl)-1,2,4-triazole with aliphatic and aromatic amines 5-aminomethyl-substituted 2-bromo-5,6-dihydrothiazolo[3,2-b]-1,2,4-triazoles were obtained. 相似文献
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N-Amination of 2-aminonaphtho[1,2-d]thiazole ( 1 ) with O-mesitylenesulfonylhydroxylamine ( 2 ) afforded the corresponding 2,3-diaminonaphthothiazolium salt 3a . Cyclocondensation of 3a or its free base 3b with appropriate carboxylic acid derivatives 4a-f gave the title compounds 5a-f in satisfactory yields (54–95%). Structures of the products were assigned on the bases of spectral and elemental analyses. 相似文献
10.
Francesco Savelli Alessandro Boido Giovanni Ciarallo 《Journal of heterocyclic chemistry》1999,36(4):857-862
In carrying on our interest in heteropolycyclic structures with biological activities, we projected the preparation of compounds containing the pyrido[3,2-e][1,2,4]triazine or pyrido[2,3-b][1,4]triazepine systems. The established synthetic approach for the preparation of latter system led to the triazine derivatives 5a-f while a new bicyclic triazepine structure 6 is accomplished with difficulty. In expanding the pyridotriazine structure, we obtained derivatives of a new tricyclic structure, 5-substituted-6a-ethyloxycarbonyl-5,6,6a,7-tetrahydropyrido[2,3-e]pyrrolo[2,1-c][1,2,4]triazin-9(8H)-ones 8 in which the triazine ring is fused with a pyrrole nucleus. Compounds 5a-f and 8a,b will be tested as potential CNS depressant, antiinflammatory, analgesic and antibacterial agents. 相似文献
11.
Barbara Milczarska Henryk Foks Urszula Dobrzycka Zofia Zwolska Ewa Augustynowicz-Kopeć 《Phosphorus, sulfur, and silicon and the related elements》2013,188(12):2793-2799
The 4-hydroxyalkyl-1,2,4-triazole-3-thiones cyclization allowed us to work out the effective method of 1,3-thiazacycloalkyl[3,2-b]-1,2,4-triazoles synthesis. Some of the compounds that were obtained were tested for their tuberculostatic activity. 相似文献
12.
F. S. Babichev V. A. Kovtunenko A. K. Tyltin I. G. Lelyukh 《Chemistry of Heterocyclic Compounds》1977,13(8):914-917
The alkylation of 4H-triazole-5-thiones with -halo ketones takes place at the sulfur atom. 1H-Thiazolo[3,2-b]-1,2,4-triazolium — a new heteroaromatic cation — derivatives were obtained by intramolecular cyclization of the resulting -keto sulfides.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1132–1134, August, 1977. 相似文献
13.
Taisei Ueda Tsuneyasu Adachi Shin-Ichi Nagai Jinsaku Sakakibara Mitsuo Murata 《Journal of heterocyclic chemistry》1988,25(3):791-794
[1,2,4]Triazino[3,2-f]purines 3a-e and [1,2,4]triazepino[3,2-f]purine 5 were synthesized by the reaction of 7,8-diamino-1,3-dimethylxanthine 1 with diketones such as glyoxal, diacetyl, dibenzoyl, pyruvic aldehyde dimethyl acetal, phenylglyoxal or acetylacetone in acetic acid in the presence of boric acid or polyphosphoric acid. 相似文献
14.
以取代苯和丁二酸酐为起始原料, 经Friedel-Crafts反应, 肼合环, Br2/HOAc氧化脱氢后得到一系列1,6-二氢-3-芳基-6-哒嗪酮(2a~2d). 然后将2a~2d与PCl5在POCl3中回流, 得到相应的氯代产物3a~3d, 将其与酰肼作用, 合环后得到一系列未见报道的哒嗪并[3,2-c]1,2,4-三唑类化合物. 所有化合物结构均经元素分析, IR, 1H NMR 和MS谱得以证实, 并对其波谱性质进行了讨论. 相似文献
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Jean-Pierre Hnichart Raymond Houssin Jean-Luc Bernier 《Journal of heterocyclic chemistry》1986,23(5):1531-1533
Thiazole rings have been often encountered in the structure of antibiotic or antitumor drugs. An easy synthesis of them has revealed itself necessary in order to elucidate the mechanism of action of these naturally occurring substances. A method of preparation of conjugated b-ethylenic thiazole[3,2-b] [1,2,4]triazoles by heating a 3-thio substituted [1,2,4]triazole in the presence of polyphosphoric acid is reported here, giving the expected product in a 60% yield. 相似文献
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1,2,4-三唑并[3,2-d][1,5]-苯并氧氮杂(艹/卓)化合物的合成 总被引:1,自引:1,他引:0
苯并二氢吡喃-4-酮的芳腙(1)衍生的偶氮基碳正离子(3)与腈发生1,3-偶极环加成反应,加成产物(4)通过「1,2」-迁移扩环重反应,形成新颖的三环系杂环化合物1,2,4-三唑并「3,2-d」「1,5」-苯并氧氮杂Zhuo化合物5a-5k。 相似文献
19.
E. V. Vorob’ev E. S. Kurbatov V. V. Krasnikov V. V. Mezheritskii E. V. Usova 《Russian Chemical Bulletin》2006,55(8):1492-1497
7H-Pyrrolo[3,2-e][1,2,4]triazolo[1,5-c]pyrimidines were synthesized by the reactions of 2-ethoxymethyleneamino-1H-pyrrole-3-carbonitriles with acid hydrazides and by the reactions of aminoiminopyrimidines (prepared based on the above-mentioned
carbonitriles) with acid chlorides.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1438–1443, August, 2006. 相似文献
20.
2-R-Fluorantheno[2,3-d]- and 2-R-fluorantheno[3,2-d]oxazoles were synthesized, and their UV and IR spectra were studied. Ten new compounds are described.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 905–907, July, 1974. 相似文献