Ml. Bennasar et al., Addition of organocopper reagents to N-alkylpyridinium salts. A flexible access to polysubstituted dihydropyridines, TETRAHEDR L, 42(4), 2001, pp. 585-588
The addition of a series of organocopper (alkyl, vinyl, allyl, and ethynyl)
reagents to 3-acyl-N-alkylpyridinium salts, followed by acylation of the i
ntermediate 1,4- or 1,2-dihydropyridines with trichloroacetic anhydride has
been studied. (C) 2001 Elsevier Science Ltd. All rights reserved.