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The saturated heterocyclic compounds comprise a large segment of organic and inorganic chemistry and are quite widespread in nature (e.g., in alkaloids, carbohydrates, plant growth regulators, etc.), the knowledge about the impacts of the stereoelectronic, steric and electrostatic interactions on the conformational properties of heterocyclic compounds is of very general interest.
Stereoelectronic effects have been recognized to influence the conformation and configuration of saturated heterocyclic compounds. The preferred geometry of the saturated heterocyclic compounds can be viewed as the result of the maximization of an interaction between the best donor lone pair and the best acceptor bond [1–3]. The most dominant conformation-controlling factor in carbohydrate compounds is known as the anomeric effect (AE) . It should be noted that the AE is in favor of the axial conformation of a six-membered saturated ring in opposition to the steric effect which normally leads to a preference for the equatorial conformation [5–7].