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The investigation of LCs containing heterocyclic units has attracted much attention in recent years due to their wide range of structural templates, in the design and synthesis of new mesogenic molecules. The introduction of heterocyclic rings into core structure to generate mesogenic material has been well demonstrated. The presence of heteroatom may have a strong effect on the polarity and polarizability of the molecule. The angle of rotation between its fragments and thereby on the temperatures of the phase transitions. In addition, the heteroatoms may participate in intermolecular...

The abundance of oxazepine and oxazepane derivatives is medically interesting compounds continues to ensure that they are important synthetic targets for organic chemists. Synthetic routes to oxazepine and oxazpane derivatives involving direct ring closure are often slow and hampered by unfavorable enthalpies and entropies of the reaction. There are many methods for the synthesis of oxazepane and oxazepine ring system, however, new simple and efficient ways for contracting oxazepine and oxazepane ring are still in great demand.