共查询到20条相似文献,搜索用时 15 毫秒
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M. F. Shostakovskii N. P. Glazkova E. S. Domnina L. V. Belousova G. G. Skvortsova 《Chemistry of Heterocyclic Compounds》1971,7(7):894-896
Quaternary salts of N-vinylimidazole and N-vinylbenzimidazole were synthesized. The structures of the products of quaternization of the N-vinylimidazoles were proved by IR and UV spectra. The distribution of the -electron density in the N-vinylimidazole molecules was obtained by quantum-chemical calculation.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 958–960, July, 1971. 相似文献
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Facile transfer of 2-trimethylsilylallyl group is achieved when (2-trimethylsilylallyl)triphenylstannane is reacted with some halides under radical reaction conditions. 相似文献
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V. A. Anisimova O. I. Askalepova K. N. Bagdasarov M. S. Chernov'yants 《Chemistry of Heterocyclic Compounds》1988,24(3):281-284
Refluxing 2-cyanomethylbenzimidazole in alcohol with alkyl halides led to low yields of N-alkylated products. Addition of base to the reaction mixture shifted the course of the reaction to form mainly N,C-dialkyl substituted products. In DMF or with an excess of alkyl halide at elevated temperature both N-mono- and N,N-dialkyl substituted materials were formed together.Translated from Khimiya Geterotsiklicheskikh Soedinenii, Vol. 24, No. 3, pp. 345–349, March, 1988. 相似文献
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S. G. T. Bhat 《Reaction Kinetics and Catalysis Letters》1981,17(1-2):93-96
The promotion of catalytic activity of zeolites by CCl4 was studied in a pulse reactor using aromatic alkylation as model reaction. The reaction of surface OH groups with CCl4 produced HCl which increased the catalytic activity. The maximum enhancement of activity occurred when the catalyst was weakly acidic.
CCl4 , . OH CCl4 HCl, . , .相似文献
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Phenylthiotrimethylsilylmethyl lithium can be alkylated and the product hydrolysed to the aldehydes by oxidation and rearrangement. 相似文献
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A facile reaction of 1-ethyl-3-methylimidazolium acetate ([EMIm]Ac) with dichloromethane at room temperature was observed with esters among the products. This esterification can be exploited for mild solvent-free esterification with a range of other carboxylate-based ionic liquids and alkyl halides. 相似文献
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Coupling reactions of tertiary and secondary alkyl halides with indenyllithiums proceeded effectively in the presence of a catalytic amount of silver bromide to provide tertiary- and secondary-alkyl-substituted indene derivatives in good yields. 相似文献
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[reaction: see text] Pd(2)(dba)(3)-Ph(3)P-catalyzed Kumada-Corriu coupling reactions of unactivated alkyl bromides or iodides with an alkynyl nucleophile furnish C(sp)-C(sp)3 bond formation. Alkynyl nucleophiles can be alkynyllithiums or the corresponding Grignard reagents. The superior performance of Ph(3)P ligand over the trialkylphosphine ligands indicates that this cross-coupling reaction may be a reductive-elimination-controlled process. 相似文献
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Copper-catalyzed direct alkylation of benzoxazoles using nonactivated secondary alkyl halides has been developed. The best catalyst is a new copper(I) complex (1), and the reactions are promoted by bis[2-(N,N-dimethylamino)ethyl] ether. 相似文献
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Ikeda Y Nakamura T Yorimitsu H Oshima K 《Journal of the American Chemical Society》2002,124(23):6514-6515
A cobalt complex, CoCl2[1,6-bis(diphenylphosphino)hexane], catalyzes an alkylation reaction of styrenes in the presence of Me3SiCH2MgCl in ether to yield beta-alkylstyrenes. A variety of alkyl halides including alkyl chlorides can be employed as an alkyl source. A radical mechanism is strongly suggested for this alkylation reaction. 相似文献