N-Chlorosuccinimide/Sodium Hydroxide-Mediated Synthesis of Benzimidazoles from Amidines under Mild Conditions
摘要:
A convenient room-temperature one-pot procedure for the preparation of benzimidazoles derivatives from N-arylamidines has been developed. The reaction of N-aryl-N'-chloro amidines, generated by the treatment of N-arylamidines with N-chlorosuccinimide, in presence of sodium hydroxide provides benzimidazoles in good to excellent yields. Nitrogen anion generated in situ from succinimide (by-product of the chlorination step using NCS) and hydroxide anion was found to be highly effective as Bronsted base to promote the cyclization into benzimidazole of N-aryl-N'-chloroamidine.
N-haloamidines. VII. 4-amino-5-chloroimidazoles and 4-amino-5-unsubstituted imidazoles from N-chloro-N′-arylbenzamidines and 1,1-diaminoethenes
作者:Elisabetta Rossi、Elena Pini
DOI:10.1016/0040-4020(96)00365-1
日期:1996.6
N-chloro-N′-arylbenzamidines react with 1,1-diaminoethenes to give in good yields 4-amino-5-chloroimidazoles. The behaviour of these compounds in some nucleophilic substitution reactions and their reduction to 4-amino-5-unsubstitutedimidazoles is reported.
Synthesis and biological activity of novel antibacterial quinazolines
作者:Preet M.S. Bedi、V. Kumar、Mohinder P. Mahajan
DOI:10.1016/j.bmcl.2004.07.065
日期:2004.10
Novel quinazolines, having interesting antibacterial activity have been prepared, characterized and tested against a panel of susceptible and resistant Gram positive and Gram negative organisms. (C) 2004 Elsevier Ltd. All rights reserved.
Borovikova, G. S.; Tsymbal, I. F.; Levchenko, E. S., Journal of Organic Chemistry USSR (English Translation), 1984, p. 1626 - 1631
作者:Borovikova, G. S.、Tsymbal, I. F.、Levchenko, E. S.、Borovik, E. I.
DOI:——
日期:——
Levchenko, E. S.; Borovikova, G. S.; Borovik, E. I., Journal of Organic Chemistry USSR (English Translation), 1984, vol. 20, p. 176 - 181
作者:Levchenko, E. S.、Borovikova, G. S.、Borovik, E. I.、Kalinin, V. N.
DOI:——
日期:——
BHATTACHARJEE, J.;MUKHERJEE, S.;MAZUMDAR, S. N.;MAHAJAN, M. P., INDIAN J. CHEM. B, 27,(1988) N, C. 368-369
作者:BHATTACHARJEE, J.、MUKHERJEE, S.、MAZUMDAR, S. N.、MAHAJAN, M. P.