Addition of organocopper reagents to N-alkylpyridinium salts. A flexible access to polysubstituted dihydropyridines
作者:M.-Lluı̈sa Bennasar、Cecı́lia Juan、Joan Bosch
DOI:10.1016/s0040-4039(00)02006-2
日期:2001.1
The addition of a series of organocopper (alkyl, vinyl, allyl, and ethynyl) reagents to 3-acyl-N-alkylpyridinium salts, followed by acylation of the intermediate 1,4- or 1,2-dihydropyridines with trichloroacetic anhydride has been studied.
1-(2-Indolyl)vinylstannane 1b has been transmetallated into both the corresponding HO mixed cyanocuprate and the Cu-catalysed organomagnesium reagent, and the reactivity of these species towards N-alkyl-3-acylpyridinium salts 8 and 17 has been tested.