Reduction of N-ethoxycarbonyl-ε-caprolactam with sodium borohydride-H+ in ethanol afforded 2-ethoxy-1-ethoxycarbonyl-hexahydro-1H-azepine in good yield, which was converted to various hexahydro-1H-azepine derivatives having O-, N-, S-, and C-functional groups at the α-position of the azepine ring.
