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1.
Treatment of compound N,N-(dithiobis(3-chloro-2,1-phenylene)dicarbonylbis (N-cyclopentylglycine)diethyl ester (3) with methanolic sodium hydroxide does not produce the expected hydrolysis product N,N-(dithiobis-(3-chloro-2,1-phenylene)dicarbonylbis (N-cylcopentylglycine) (4) but yields a mixture of compounds 8-chloro-3-cyclopentyl-3,4-dihydro-4-oxo-2H-1,3-benzothiazine-2-carboxylic acid (6) and N-(3-chloro-2-mercaptobenzoyl)-N-cyclopentylglycine (7). This unexpected observation has the potential of a new heterocyclic synthesis method for the 4-oxo-2H-1,3-benzothiazine class of compounds. 相似文献
2.
A. M. Kibardin A. Kh. Plyamovatyi R. R. Shagidullin Yu. Ya. Efremov T. V. Gryaznova A. N. Pudovik 《Russian Chemical Bulletin》1994,43(2):283-285
The reaction of 1,3-dibutyl-2-ethoxy-4,5-dimethyl-2-oxo-1,3,2-diazaphosphol-4-ene with tetracyanoethylene gives 6-amino-1,3-dibutyl-5-cyano-2-ethoxy-4-(1-imino-2-cyanoethyl)-2-oxo-1,3,2-diazaphosphindane.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 303–305, February, 1994. 相似文献
3.
The syntheses and polymerizations of (2-oxo-1,3-dioxolan-4-yl)methyl acrylate, 4-(2-oxo-1,3-dioxolan-4-yl)methyl itaconate, and (2-oxo-1,3-dioxolan-4-yl)methyl maleate are described. Reactivity ratios in the copolymerization of these monomers with other comonomers are reported and the Alfrey-Price Q and e values calculated. The post-polymerization effects of ultraviolet light and heat on these polymers and copolymers are presented and compared to those for similar polymers containing the 2,2-dimethyl-1,3-dixolane groups, which performs as an internal ultraviolet sensitizer. The 2-oxo derivatives are crosslinked thermally but not by ultraviolet light. The crosslinking reaction can be catalyzed by acids, bases, and salts. 相似文献
4.
The 13C NMR chemical shifts for 4-oxo-1,3-dioxolane (1) and its all methyl-substituted derivatives (2-10) as well as for 5-oxo-1,3-oxathiolane (11) and its nine alkyl-substituted derivatives (12-20) are reported. The magnitude and variety of the substituent effects are in accordance with the envelope conformations in which the oxygen or sulfur atom locates at the tip of the envelope as postulated on the basis of earlier data. 相似文献
5.
V. V. Mezheritskii L. G. Minyaeva Yu. I. Ryabukhin G. N. Dorofeenko 《Chemistry of Heterocyclic Compounds》1977,13(3):260-264
A method is proposed for the synthesis of 2-(-dimethylaminovinyl)-4-oxo-1,3-benzoxazinium salts and dimethyl (4-oxo-3H-1,3-benzoxazine-2-methylene) sulfonium salts by condensation of 2-alkylbenzoxazinonium salts with dimethylformamide and dimethyl sulfoxide.Translated from Khimiya Geterotsiklichesikikh Soedinenii, No. 3, pp. 328–331, March, 1977. 相似文献
6.
1,3-Dithiole-2-thione derivatives, which are starting compounds for the synthesis of new electron donors of the tetrathiafulvalene class, viz., bis(2-thia-1,3-propylendithio)tetrathiafulvalene and bis(2-oxo-1,3-propylendithio)tetrathiafulvalene, were obtained by the reaction of bis(tetraalkylamonium) bis(1,3-dithiole-2-thione-4,5-dithiolato)zincates with 1,3-dichlorodimethyl sulfide and 1,3- dibromoacetone.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 471–474, April, 1990. 相似文献
7.
Conclusions When trimethyl phosphite, tri(dimethylamino)phosphine, triphenylphosphine, and dimethylphosphorous acid are reacted with 2-oxo-1,3-dithio-1,3-diphenylpropane the latter is desulfurized and deoxidized.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2101–2103, September, 1976.The authors express their gratitude to É. L Gol'dfarb for taking the31P NMR spectra. 相似文献
8.
Hai-Yan Xu Shun-Yi Wang Ran Jiang Xiao-Ping Xu Xue-Qiang Chu Shun-Jun Ji 《Tetrahedron》2012,68(39):8340-8346
An efficient method for the cross-coupling reactions of 1,3-dicarbonyl compounds with 2-oxo-1-pyrrolidine compounds 1 was developed. Cu(OTf)2 catalyzed C–C bond forming reactions using substrates 1 with 1,3-dicarbonyl compounds in chloroform, providing the corresponding compounds of 2-oxo-1-pyrrolidine bearing 1,3-dicarbonyl moiety in moderate to good yields. 相似文献
9.
G. A. Mironova E. N. Kirillova V. N. Kuklin N. A. Smorygo B. A. Ivin 《Chemistry of Heterocyclic Compounds》1984,20(10):1088-1094
The reaction of 2-aryl-4-hydroxy-6-oxo-1,3-thiazines with Vilsmeier's reagent results in the formation of a mixture of 2-aryl-6-oxo-4-chloro-1,3-thiazines and their 5-formyl analogs. Reactions involving the nucleophilic replacement of the halogen and nucleophilic addition to an aldehydic group have been studied. The intramolecular cyclization of the oxime and phenylhydrazone of 6-oxo-2-phenyl-5-formyl-4-chloro-1,3-thiazine gives new heteroaromatic systems, viz., isoxazolo-[4,5-d]-1,3-thiazine and pyrazolo]4,5-d]-1,3-thiazine, respectively.For report 54 see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1328–1334, October, 1984. 相似文献
10.
Ali Ramazani Ali Reza Kazemizadeh Bijan Ganjeie Ebrahim Ahmadi 《Phosphorus, sulfur, and silicon and the related elements》2013,188(11):2569-2572
Tiourea reacts with dialkyl acetylenedicarboxylates in solventless conditions to form 1:1 adducts, which undergo a cyclization reaction to produce alkyl Z-2-(2-amino-4-oxo-1,3-thiazol-5(4H)-yliden)acetates in fairly good yields. The stereochemistry of the ethyl Z-2-(2-amino-4-oxo-1,3-thiazol-5(4H)-yliden)acetate was established by the use of X-ray single crystal structure analysis. The reaction is completely stereoselective. 相似文献
11.
G. V. Baryshnikov B. F. Minaev V. A. Minaeva H. Ågren 《Journal of Structural Chemistry》2010,51(5):817-823
The quantum chemical DFT method with the B3LYP hybrid functional in 6–31++G(d,p) and 6–311+G(d,p) basis sets is used to calculate the equilibrium geometric parameters of different conformations of 5-(4-oxo-1,3-thiazolidine-2-ylidene)-rhodanine
and its substituted form ethyl–5-(4-oxo-1,3-thiazolidine-2-ylidene)-rhodanine-3′-acetic acid applied in the synthesis of indoline
and some other sensitizing dyes for solar cells. The thermodynamic parameters of four conformers and their synthesis reactions
are calculated. The effect of substituents on the thermodynamic stability of the studied isomers is shown. 相似文献
12.
N. I. Vikrishchuk Yu. I. Ryabukhin A. D. Vikrishchuk 《Russian Journal of General Chemistry》2009,79(7):1509-1512
Reduction of 4-oxo-1,3-benzoxazinium perchlorates with sodium borohydride depending on the structure of starting salt and
the reaction conditions leads to different products. 2-Alkyl- and 2-phenylsubstituted salts react with sodium borohydride
to give 2,3-dihydro-4-oxo-1,3-benzoxazines. 2-Arylvinyl- and 2-heterylvinyl-substituted perchlorates either form 4-oxo-1,3-benzoxazines
or undergo hydrogenation to arylor heterylethyldihydrobenzoxazinones. 相似文献
13.
A microscale synthesis (500 mg) of the product 3-[5-anilino-(2,3-d)-dioxole-1,3]-1-oxo-1, 3-dihydro-2-benzofurane (COR.01.126) is described. This method, which requires only four steps, is principally available for the 14C-labeled synthesis with labeled phthalic anhydride as starting material. 相似文献
14.
The cyclocondensation of 4-chloro-2-oxo-2H-chromene-3-carbaldehyde with 1,3-bis(silyloxy)-1,3-butadienes provides a convenient synthesis of benzo[c]chromen-6-ones. 相似文献
15.
Cherkupally Sanjeeva Reddy L.Sanjeeva Rao M.Vani Devi G.Rajesh Kumar A.Nagaraj 《中国化学快报》2010,21(9):1045-1048
<正>A series of some new 2-imino-5-[(Z)-1-(4-methylphenyl)methylidene]-3-[5-(2-oxo-2H-3-chromenyl)-1,3-oxazol-2-yl]-1,3- thiazolan-4-ones 5a-j has been synthesized and assayed for their antibacterial activity against Gram-positive bacteria viz.Bacillus subtilis(ATCC 6633),Staphylococcus aureus(ATCC 6538p) and Micrococcus luteus(IFC 12708),and Gram-negative bacteria viz. Proteus vulgaris(ATCC 3851).Salmonella typhimurium(ATCC 14028) and Escherichia coli(ATCC 25922).Among the screened compounds,5d,5e,5f,5g,and 5j exhibited potent inhibitory activity compared to standard drug,and emerged as potential molecules for further development. 相似文献
16.
N. N. Smolyar O. Yu. Pankina A. I. Bondarenko Ya. S. Borodkin A. I. Khizhan 《Russian Journal of Organic Chemistry》2011,47(8):1190-1193
Reactions of 5-amino-1,3-dialkyl-1,3-dihydrobenzimidazol-2-ones with 2,5-dimethoxytetrahydrofuran and 2,6-dimethyl-γ-pyranone
led to the formation of 1,3-dialkyl-1,3-dihydro-5-(pyrrol-1-andл)benzimidazol-2-ones and 1-(1,3-dialkyl-2-oxo-1,3-dihydrobenzimidazol-5-yl)-2,6-dimethylpyridin-4-ones. 相似文献
17.
Yu. I. Ryabukhin O. B. Korzhavina O. Yu. Ryabukhina A. G. Gasanov A. D. Garnovskii 《Chemistry of Heterocyclic Compounds》1989,25(12):1381-1384
A method has been developed for synthesis of 4-alkylthio-2-(o-hydroxyphenyl)-1,3,5-triazines by treatment of 4-oxo-1,3-benzoxazine perchlorates with S-methyl, benzyl, and allyl-isothioureas.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1658–1661, December, 1989. 相似文献
18.
Ali Ramazani Ali Morsali Bijan Ganjeie Ali Reza Kazemizadeh Ebrahim Ahmadi 《Phosphorus, sulfur, and silicon and the related elements》2013,188(11):2439-2442
Abstract Selenourea reacts with dialkyl acetylenedicarboxylates in acetone to form 1:1 adducts, which undergo a cyclization reaction to produce alkyl Z-2-(2-amino-4-oxo-1,3-selenazol-5(4H)-yliden) acetates in fairly good yields. The reaction is completely stereoselective. 相似文献
19.
E. Yu. Suvorova N. I. Vikrishchuk L. D. Popov Z. A. Starikova A. D. Vikrishchuk Yu. A. Zhdanov 《Russian Journal of Organic Chemistry》2007,43(10):1553-1558
Condensation of 2-methyl-4-oxo-1,3-benzoxazinium perchlorate with various aromatic and heterocyclic aldehydes provided previously unknown arylvinyl-and hetarylvinyl-substituted salts whose recyclization under treatment with guanidine resulted in formerly undescribed 1,3,5-triazines. The reaction of perchlorates obtained with guanidinebenzoxazole led to the formation of bishetarylamines, with guanidinebenzimidazole formed triazinebenzimidazoles, the cyanoguanidine reacted with 4-oxo-1,3-benzoxazinium perchlorates to give cyanamides. 相似文献
20.
A. N. Pudovik V. K. Khairullin M. A. Vasyanina I. K. Pokrovskaya O. N. Kataeva I. A. Litvinov V. A. Naumov 《Russian Chemical Bulletin》1990,39(11):2345-2348
Sodium salts of 2, 2-dimethyl-4-mercapto-5-oxo-1,3-thiazoline and 2-oxo-3-mercapto-1-thia-4-azaspiro[4.5]dec-3-ene, obtained from a solvate of sodium cyanodithioformate with three molecules of dimethylformamide, acetone, or cyclohexanone in the presence of morpholine, react with chlorothioformic dimethylamide with the formation of 2,2-dimethyl-5-oxo-4-(dimethylaminothiocarbonylthio)-1,3-thiazoline and 2-oxo-3-(dimethylaminothiocarbonylthio)-1-thia-4-azaspiro[4.5]dec-3-ene, respectively, and during acidolysis by hydrochloric acid they are converted to 2,2-dimethyl-5-oxo-4-thiono-1,3-thiazolidine and 2-oxo-3-thiono-1-thia-4-azaspiro[4.5]decane. The latter compounds are facilely phosphorylated by dialkyl chlorophosphonates at the nitrogen atom. The reaction of the solvate of sodium cyanodithioformate with three molecules of dimethylformamide with chloroacetone in the presence of morpho-line occurs anomalously with the formation of cyanothioformic morpholide.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2590–2593, November, 1990. 相似文献