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One-Pot Cascade Approach to Phen­anthridine-Fused Qui­nazo­linimi­niums from Heteroenyne-Allenes

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posted on 07.03.2014, 00:00 by Olajide E. Alawode, Vijaya Kumar Naganaboina, Thakshila Liyanage, John Desper, Sundeep Rayat
A one-pot cascade method to obtain functionalized phen­anthri­dine-fused quinazoliniminiums from a variety of heteroenyne-allenes is described. This protocol involves formation of C–N and C–C bonds in a single step in the presence of a Lewis acid and trace water to afford pentacyclic title compounds in moderate to good yields.