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排序方式: 共有70条查询结果,搜索用时 16 毫秒
1.
S. M. Ramsh A. G. Ivanenko V. A. Shpilevyi N. L. Medvedskiy P. M. Kushakova 《Chemistry of Heterocyclic Compounds》2005,41(7):921-928
Alkaline hydrolysis of 3-tert-butyl-7,7-bis(hydroxymethyl)-3,4-dihydro-2H-thiazolo[3,2-a][1,3,5]-triazin-6(7H)-one can occur in three directions: with cleavage of the tetrahydrotriazine ring, with cleavage of the
thiazolidine ring, and also with opening of both rings. Depending on the process conditions, either the hydrolysis product
corresponding to the first direction or the hydrolytic decomposition products corresponding to the second and third directions
can be obtained in preparative quantities. Hydrolysis of 3,3′-di-tert-butyl-3′,4′-dihydro-2′ H-spiro[(perhydro-1,3-oxazine)-5,7′-thiazolo[3,2-a][1,3,5]triazin]-6′-one in (NH4)2CO3 solution occurs in two steps: in the first step, cleavage of the tetrahydrotriazine ring occurs; and in the second step,
opening of the perhydrooxazine ring occurs.
__________
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 1089–1097, July, 2005. 相似文献
2.
V. S. Fundamenskii S. M. Ramsh V. A. Brouskov A. V. Smirnova A. Yu. Yanichev M. B. Fleisher S. V. Belyakov 《Russian Journal of Organic Chemistry》2013,49(5):672-677
It was shown by the method of powder X-ray diffraction analysis that in the crystalline state the product of the reaction of thiourea with chloroacetic acid in water, (carbamimidoylsulfanyl)acetic acid, existed in the zwitter-ion tautomeric form. The structure consists of virtually planar infi nite layers normal to the c axis of the unit cell which are bound by van der Waals interactions. The layers are formed by infi nite rows elongated along the b axis of the unit cell consisting of materially planar zwitter-ionic molecules linked by strong bifurcated hydrogen bonds. The results of quantum-chemical calculations by PM6 method are in agreement with the XRD results: whereas an isolated molecule exists in nonzwitter-ionic tautomeric form, in the crystal only the zwitterionic tautomer is present. 相似文献
3.
A series of bis-intercalators of the TOTO and BOBO families (symmetric structures each containing two molecular fragments of nonsymmetric cyanine dyes, viz., Thiazole orange (TO) or Benzothiazole orange (BO)) were synthesized in high yields by the reactions of 1,1′-L-bis-(4-methylpyridinium) derivatives (L is the dicationic linker) with 3-methyl-2-(methylsulfanyl)-benzothiazolium iodide under microwave irradiation. 相似文献
4.
U. N. Dmitrieva S. M. Ramsh Yu. E. Zevatskii T. V. Artamonova L. V. Myznikov 《Chemistry of Heterocyclic Compounds》2012,48(2):355-357
The arylation of 1-phenyltetrazole-5-thione using a series of iodobenzene derivatives in the presence of cuprous chloride
and a ligand such as ethylenediamine. It was shown that the use of microwave activation permitted shortening of the reaction
time, increasing yields and simplification of the reaction products isolation. 相似文献
5.
A. S. Ramsh E. A. Sidorovich G. P. Petrova S. K. Kurlyand M. V. Zhuravlev O. V. Blagodatova N. V. Lebedev V. A. Gubanov 《Russian Journal of Applied Chemistry》2010,83(12):2172-2174
Samples of SKF-26 fluororubber modified by incorporating pendant methoxy groups into the macromolecular chain were studied
by dielectric spectroscopy and dynamic mechanical analysis. 相似文献
6.
7.
Alkali salts of 2-phenylimino-4-thiazolidinone were produced by mixing an acetone solution of it over granulated alkali.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 905–906, July, 1984. 相似文献
8.
S. Yu. Solov'eva-Yavits S. M. Ramsh A. I. Ginak 《Chemistry of Heterocyclic Compounds》1981,17(4):340-343
It is shown that the aminomethylation of 2-iminothiazolidin-4-one and its 5-methyl and 5-arylidene derivatives in an alcohol medium leads to the formation of 6-oxo-2,3,4,5,6,7-hexahydrothiazolo [3,2-a]-1,3,5-triazines. The structures of the compounds obtained were confirmed by their IR, PMR, and UV spectra.See [1] for Communication 39.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 477–480, April, 1981. 相似文献
9.
10.
Yu.?A.?MartinovichEmail author S.?M.?Ramsh F.?Hamoud V.?S.?Fundamenskii V.?V.?Gurzhii V.?I.?Zakharov E.?S.?Khrabrova 《Russian Journal of Organic Chemistry》2018,54(6):878-885
Three-component condensation of thiourea with equimolar amounts of formaldehyde and morpholine afforded N-(morpholin-4-ylmethyl) derivative, whereas analogous reaction with 2 equiv of formaldehyde and amine gave symmetrical N,N′-bis(morpholin-4-ylmethyl)thiourea. In the condensation of thiourea with piperidine and formaldehyde, only symmetrical N,N′-bis(piperidin-1-ylmethyl)thiourea was isolated, regardless of the reactant ratio. 相似文献