Synthesis of 1,4-Dihydropyridines Bearing a Carbamate Moiety on the 4-Position

Table 2

Synthesis of 1,4-dihydropyridine derivatives (2a–f).

Entry	Carbamates	Product	Yield^a %	Time (h)	M.p. °C
1			88	17	240–243
2			91	24	233–238
3			75	24	228–234
4			53	24	225–230
5			70	20	242–248
6			69	20	232–244

aIsolated yield.