Application of an Ugi type reaction to an N-silyl-4,4-disubstituted 1,4-dihydropyridine

Ugi type reactions of an N-silyl-4,4-disubstituted 1,4-dihydropyridine with various isocyanides and carboxylic acids provided 2-carbamoylated 1,2,3,4-tetrahydropyridine derivatives in good yields and with high stereoselectivities.