Reaction of unsubstituted cyclic secondary amines and epichlorohydrin followed by treatment with alkali gare, when allowed to proceed to completion, 2, 5-bis- (dialkylaminomethy1)-$-dioxanes. The structures were proved by independent synthesis and conditions were determined for directing the reactions to either the dioxanes or the N-(2, 3-epox:~ propyl)-dialkylamines as the major products.