Browsing by Subject "Zinc powder"
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Article
Ring contraction of 1,3-diphenylbenzo[1,2,4]triazinyl radicals to 1,2-diphenylbenzimidazoles
(2014)Reductive ring contraction of 1,3-diphenyl-1,4-dihydrobenzo[e][1,2,4] triazin-4-yls (Blatter's radicals) using zinc powder (2 equiv.) in acetic acid heated to ca. 118 °C gives 1,2-diphenylbenzimidazoles in high yield. ...