1-(Benzimidazol-2-yl)-1,2-dioxoalkane arylhydrazones and 2-phenylbenzimidazole as the main products of the reactions of 1,2,3-triketone 2-arylhydrazones with o-phenylenediamine
Olga G. Khudina, Natal'ya V. Murashova, Yanina V. Burgart and Viktor I. Saloutin
Mendeleev Communications Volume 13, Issue 5, 2003, Pages 228-229
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http://dx.doi.org/10.1070/MC2003v013n05ABEH001788
or
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B8G3W-4S1JX8R-H&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a14ccfa399e95b3799abc6d9970c796b
or
http://www.rsc.org/publishing/journals/MC/article.asp?doi=x0013228
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