New chemical access for pyran core embedded derivatives from bisalkenylated 1, 3-diketones and 1, 3-diketoesters via tandem C-dealkenylation and cyclization

T Narender, S Sarkar, K Venkateswarlu, JK Kumar

Index: Narender; Sarkar; Venkateswarlu; Kumar Tetrahedron Letters, 2010 , vol. 51, # 50 p. 6576 - 6579

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Citation Number: 6

Abstract

New chemical access has been developed for the synthesis of pyran core embedded derivatives from 1, 3-diketones and 1, 3-diketoesters, in which the active methylene group of 1, 3-diketone or 1, 3-diketoester was alkenylated with three equivalents of alkenyl bromides in presence NaH to give bisalkenyl 1, 3-diketones or 1, 3-diketoesters and the resultant bisalkenyl 1, 3-diketones or 1, 3-diketoesters were reacted with AlCl3 at room temperature ...