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1.
Esters of (arylhydrazono)chloroacetic acid reacted with tris(hydroxymethyl)aminomethane in the presence of trimethylamine under mild conditions to give 3-(arylhydrazonoyl)-5,5-di(hydroxymethyl)-2-oxomorpholines. 相似文献
2.
V. N. Britsun A. N. Esipenko V. V. Pirozhenko M. O. Lozinskii 《Chemistry of Heterocyclic Compounds》2005,41(10):1334-1338
We have established that the products of aminolysis of 2-aryl-5-R-5,6-dihydro-7H-[1,2,4]triazolo-[5,1-b][1,3]thiazin-7-ones
in boiling ethanol are 3-R-3-(5-aryl-4H-1,2,4-triazol-3-ylsulfanyl)-propanamides, and at 180°C–210°C (depending on the structure
of the substituent R): 3-phenyl-4,5-dihydro-1H-1,2,4-triazoline-5-thione and 3-arylacrylamides or 3-(3-aryl-5-thioxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)propanamides.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1587–1592, October, 2005. 相似文献
3.
4.
V. N. Britsun A. N. Esipenko M. O. Lozinskii 《Chemistry of Heterocyclic Compounds》2008,44(12):1429-1459
Data from the last six years on the heterocyclization of thioamides containing an active methylene group are analyzed and
classified.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1763–1800, November, 2008. 相似文献
5.
R. B. Gutsulyak V. N. Britsun Yu. A. Serguchev 《Theoretical and Experimental Chemistry》1995,31(4):200-202
It was shown that the main products of oxidative chlorination of acetylenes by the system K2S2O8-MCln in pyridine are transdichloroalkenes. It was established that the formation of chloro-derivatives from unsaturated hydrocarbons proceeds only in the presence of ions of metals of variable valence (Cu2+, Co2+, Fe3+). A possible reaction scheme is proposed.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 31, No. 4, pp. 243–246, July–August, 1995. 相似文献
6.
V. N. Britsun A. N. Esipenko V. V. Piroghenko M. O. Lozinskii 《Chemistry of Heterocyclic Compounds》2008,44(8):979-984
[3+3] Cyclocondensation of 5-benzoyl-3-ethoxycarbonyl-6-methylthio-1-R-1,2-dihydropyrid-2-ones with heterocyclic N,N-and N,C-1,3-dinucleophiles
proceeds regioselectively to give a series of new tri-and tetracyclic heterosystems, viz. derivatives of 5,6-dihydropyrazolo[1,5-a]pyrido[2,3-d]pyrimidin-6-one,
1,2-dihydropyrido[2,3-d]pyrido[2′,3′: 3,4]pyrazolo[1,5-a]pyrimidin-2-one, 8,9-dihydro-5H-pyrido-[2,3-d]thiazolo[3,2-a]pyrimidin-8-one,
1,2-dihydrobenzo[4,5]imidazo[1,2-a]pyrido[2,3-d]pyrimidin-2-one, and 1,2-dihydrobenzo[4,5]imidazo[1,2-g][1,6]naphthyridin-2-one. 相似文献
7.
V. N. Britsun A. N. Borisevich A. N. Esipenko M. O. Lozinskii 《Russian Journal of Organic Chemistry》2007,43(1):103-107
N-Aryl-3-oxobutanethioamides react with 2-amino-1,3-thiazole (2-amino-1,3-benzothiazole) in acetic acid to give mixtures of 7-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidine-5-thione (2-methyl-4H-pyrimido-[2,1-b][1,3]benzothiazole-4-thione) and 5-arylimino-7-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidines (4-arylimino-2-methyl-4H-pyrimido[2,1-b][1,3]benzothiazoles), whose ratio depends on the nature of the aryl substituent in the initial butanethioamide. 相似文献
8.
Britsun V. N. Serguchev Yu. A. Ganushchak N. I. 《Russian Journal of General Chemistry》2001,71(2):261-264
When chlorinated in chloroform, (E)-stilbenes bearing electron-donor substituents in the para position of the benzene ring give threo-1,2-diaryl-1,2-dichloroethanes, while meta-substituted (E)-stilbenes, predominantly erythro isomers, irrespective of the nature of the substituent. The reactions in acetic acid result in preferential formation of threo-1,2-dichloro- and threo-1-acetoxy-1,2-diaryl-2-chloroethanes. 相似文献
9.
Britsun V. N. Esipenko A. N. Kudryavtsev A. A. Lozinskii M. O. 《Russian Journal of Organic Chemistry》2004,40(2):232-238
A new procedure for preparation of 2-R-5-aryl-5,6-dihydro-7H-[1,2,4]triazolo[5,1-b][1,3]thiazin-7-ones by condensation of 5-R-1,2,4-triazole-3-thiones with 3-arylacryloyl chlorides was developed. The thiazine ring of the [1,2,4]triazolo[5,1-b][1,3]thiazin-7-ones is easily cleaved by treating with ammonia and hydrazine affording amides and hydrazides of 3-aryl-3-(1H-1,2,4-triazol-5-ylsulfanyl)propanoic acids. The latter react with isothiocyanates furnishing carbamoyl thiohydrazides of 3-aryl-3-(1H-1,2,4-triazol-5-ylsulfanyl)propanoic acids that in alkaline media undergo cyclization into 4-aryl-5-[2-(4H-1,2,4-triazol-5-ylsulfanyl)-2-phenylethyl]-2,4-dihydro-3H-1,2,4-triazole-5-thiones. 相似文献
10.
V. N. Britsun A. N. Esipenko M. O. Lozinskii 《Chemistry of Heterocyclic Compounds》2006,42(3):396-402
We have studied the reaction of 2,3-dihydro-4H-[1,3]thiazino[3,2-a]benzimidazol-4-one and 2-aryl-2,3-dihydro-4H-[1,3]thiazino[3,2-a]benzimidazol-4-ones
with amines, alkylating reagents, and hydrogen peroxide. We have shown that the presence of an aryl substituent at the 2 position
of [1,3-thiazino[3,2-a]benzimidazol-4-ones has a substantial effect on the direction of the reactions.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 445–452, March, 2006. 相似文献