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1.
A method is suggested for isomerization of -acetylenic ketones with migration of the oxo group from position 1 to position 3 and of the triple bond from position 2 to position 1 of the ketoacetylenic fragment; it consists of addition of Et2NH at the triple bond of the ketone, conversion of the adduct to the imminium salt with POCl3, followed by alkaline hydrolysis. The isomerization is achieved in one preparative stage without isolation of intermediate compounds.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2094–2098, September, 1990. 相似文献
2.
A new pathway is proposed for the preparation of terminal acetylenes entailing the condensation of acid chlorides with phenylacetylene, isomerization of the acetylenic ketones with displacement of the oxo group and triple bond in the ketoacetylenic fragment, and subsequent alkaline cleavage of the isomerized ketones.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2622–2624, November, 1990. 相似文献
3.
The addition of secondary and primary amines to ethyl (1-amino-9,10-anthraquinon-2-yl)propynoate affords an easily separable
mixture of the corresponding ethyl 3-dialkylaminoor 3-alkylamino-3-(1-amino-9,10-anthraquinon-2-yl)acrylate and 3-dialkylamino-
or 3-alkylaminonaphthol[2,3-h]quinoline-2(1H), 7,12-trione (in ∼4: 1 ratio). Intramolecular cyclization of the resulting substituted ethyl acrylates results in the formation
of 4-dialkylaminoor 4-alkylamino-2-chlorinated pyridine rings. Subsequent nucleophilic substitution of the chlorine atom gives
2-functionalized 4-dialkylamino- or 4-alkylaminonaphtho[2,3-h]quinoline-7,12-diones.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2327–2332, November, 1998. 相似文献
4.
2-Alkynyl-l-amino-9,10-anthraquinones react with HNO2 in a mixture of dilute HCl and dioxane at 20 °C to give I , 1-dichloroalkyl- IH-3-naphto[2,3-g]indazole-6,1 1 -diones. This reaction differs from the known cylization ofortho-alkynylbenzenediazonium salts involving the formation of a pyridazine ring (the Richter synthesis of 4-hydroxy- and 4-halocinnolines).Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1803–1807, July, 1996, 相似文献
5.
6.
Syntheses are reported for monomers and oligomers of dipropyl and di(propen-1-yl) (cis,cis and cis, trans isomers) ethers of 2-(4 -hydroxy-3, 5 -diethynylphenyl)- 2-(4-hydroxyphenyl)propane.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1668–1670, July, 1991. 相似文献
7.
M. S. Shvartsberg E. A. Kolodina N. I. Lebedeva L. G. Fedenok 《Russian Chemical Bulletin》2012,61(3):582-588
The Pd-catalyzed reaction between 3-acetylamino-2-bromo-1,4-naphthoquinones and CuI acetylides prepared in situ gave 3-acetylamino-2-alkynyl-1,4-naphthoquinones, which were transformed into benz[f]indole-4,9-dione and benzo[g]quinoline-5,10-dione derivatives. 相似文献
8.
9.
Cleavage of long-chain 2-methyl-3,5-alkadiyne-2-ols in anhydrous benzene in the presence of KOH (Favorsky retroreaction) is accompanied by migration of the triple bonds and it affords 2,4-alkadiynes. Proton-donor additives (alcohol or water) completely suppress the isomerization process and enable preparation of terminal acetylenes in high yields.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1525–1529, August, 1995.This work was carried out with financial support from the Rnssian Foundation for Basic Research (Project No. 93-03-4027). 相似文献
10.
Barabanov I. I. Fedenok L. G. Polyakov N. E. Shvartsberg M. S. 《Russian Chemical Bulletin》2001,50(9):1663-1667
When heated in piperidine, 1-amino-2-(3-hydroxyalk-1-ynyl)-9,10-anthraquinones undergo cyclization into 2-(1-hydroxyalkyl)naphtho[2,3-g]indole-6,11-diones. In contrast, 1-amino-2-(3-hydroxy-3-phenylpropynyl)-9,10-anthraquinone reacts with primary and secondary amines to give the corresponding 1-amino-2-(1-amino-2-benzoylvinyl)-9,10-anthraquinones, which undergo cyclization into 4-dialkylamino- or 4-alkylamino-2-phenylnaphtho[2,3-h]quinoline-7,12-diones. Heating of the starting phenylpropynol with Et3N causes its dehydrogenation and isomerization. 相似文献