Pradipta Das, J. T. Njardarson
Aug 6, 2015
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Organic letters
Abstract
Two new approaches for forming 1,2,3,6-tetrahydropyridines are reported. Both reactions employ a strategic phosphate substituent on the nitrogen atom. In the presence of an additional phosphate substituent (X = P = O(OEt)2) an anionic cascade can by triggered upon treatment with base. Alternatively, when X = H the same 1,2,3,6-tetrahydropyridine product can be accessed via an acid catalyzed cyclization.