Tetrahedron letters

2, 4, 6-Tris (dialkylamino) pyrylium salts and related systems, synthesis and reaction behaviour

W Schroth, R Spitzner, E Kleinpeter

Index: Schroth, Werner; Spitzner, Roland; Kleinpeter, Erich Tetrahedron Letters, 1988 , vol. 29, # 37 p. 4695 - 4698

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Citation Number: 13

Abstract

Abstract: 2, 4, 6-Tris (dialkylamino) pyrylium salts 2 and 2, 6-bis (dialkylamino)-pyran-&ones 11 as well as their thio-analogues l0, 12 have been prepared by a multi-step route starting with 1, 1, 5, 5-tetrachloro-penta-1, 4-dien-3-one (1). The tris (dialkylamino)-substituted 2, $ J undergo electrophilic substitution, They are better represented as polymethine-like systems. The 2, 6_bis (dialkylamino)-substituted ll, at the carbonyl-oxygen. 12 display a significantly ...