S. Fustero et al., Synthesis and C-alkylation of C-protected beta-enamino acid derivatives from oxa- thia- and imidazolines, TETRAHEDRON, 55(9), 1999, pp. 2695-2712
Various heterocycles 3a-h can be readily metallated and condensed with a va
riety of organic nitriles to afford C-protected beta-enamino acid derivativ
es 1 (or 2). Procedures for alkylation of compounds 1 to obtain 2 as well a
s a "one-pot" preparation of 2 from 3 are also described. (C) 1999 Elsevier
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