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1.
Some new polymethine dyes of the cyanine and merocyanine series which are derivatives of 5- and 6- thienopyridines are synthesized.
Replacement of a vinyl group at a sulfur atom in the condensed benzene ring of quinoline in dyes which are derivatives of
this base, always leads to a bathochromic shift of the absorption maximum of the corresponding dyes. 相似文献
2.
The synthesis of 2-methylselenonaphtheno[2,3-d]thiazole and 2-methylselenonaphtheno[2,3-d]-oxazole is described.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 37–38, January, 1971. 相似文献
3.
New heterocyclic bases with a condensed heterocyclic ring in the molecule are synthesized. They are 7-methylthieno[3, 2-f ]quinoline and 9-methylthieno[3, 2-f]quinoline. 相似文献
4.
Some new polymethine dyes of the cyanine and merocyanine series, containing thieno[2, 3-b]thieno[2, 3-b]pyridine-4 and thieno[3, 2-b]-thieno[2, 3-b]-pyridine-8 groups are synthesized. Replacement of the vinylene group by a sulfur atom in the condensed benzene rings of the 5, 6-benzoquinoline-4 group in dyes which are derivatives of this base, results in a marked hypsochromic shift of the absorption maximum of the corresponding dyes.For Part IV see [8]. 相似文献
5.
2H-Pyrano-, 2H-thiapyrano-, and 2H-selenapyrano[2,3-b]pyridines containing a methyl group in the position of the pyridine ring were synthesized by Claisen condensation of the ethyl esters of, respectively, 2-ethoxy-, 2-ethylthio-, and 2-ethylseleno-6-methylpyridine-3-carboxylic acids with ethyl acetate, reduction of the resulting ethyl esters of 2-ethoxy-, 2-ethylthio-, and 2-ethylseleno-6-methylnicotinoylacetic acids with lithium aluminum hydride, and heating of the resulting 2-substituted 3-(, -dihydroxypropyl)-6-methylpyridines with 48% hydrobromic acid.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1539–1540, November, 1972. 相似文献
6.
A new heterocyclic base — 2-methylthieno[3,2-b]thieno[2,3-d]thiazole — was synthesized by heating 2-acetamido-3-hydroxythieno[3,2-b]thiophene with phosphorus pentasulfide.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1039–1041, August, 1976. 相似文献
7.
8.
New heterocyclic bases—4,4,5-trimethylthieno[2, 3-b]pyrrolenine and 5, 6, 6-trimethylthieno[3,2-b]pyrrolenine—have been obtained by the condensation of the double salts of stannic chloride and the hydrochlorides of, respectively, 2- and 3-aminothiophenes with methyl-hydroxyisopropyl ketone and methyl-bromoisopropyl ketone. 相似文献
9.
The synthesis of a new heterocyclic base — 2-methyl-5-phenylthieno[2,3-d]thiazole — is described.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, 1624–1625, December, 1970. 相似文献
10.
P. I. Abramenko V. G. Zhiryakov L. A. Balykova T. K. Ponomareva 《Chemistry of Heterocyclic Compounds》1974,10(6):691-692
Three-ring benzo[b]furan, benzo[b]selenophene, and benzo [b]thiophene systems condensed with a pyridine ring and having a methyl group in the γ position of the pyridine ring were synthesized. 相似文献