Highly Regio- and Chemo-selective γ-Addition of Benzylic Group to N-Alkoxycarbonylpyridinium Salts by means of Organotin Reagent
Benzyltin reagents undergo highly regio- and chemo-selective γ-addition to a variety of N-acylpyridinium salts to give 4-benzyl-1,4-dihydropyridines exclusively in good yields.