Studies On The Synthesis Of Organic Reaction Under Microwave Irradiation

As a new type of material, liquid crystals compounds were developed very fast in these years. Microwave irradiation is a new technology for experiences. And it was used in organic reactions or organic synthesis widely recent year. When we synthesis the liquid crystals under microwave irradiation, we found that reaction time was shorted at large.Chapter 1: Hydrogen bonding is one of the principal intermolecular forces to enable the construction of supramolecular structures. And self-assembly via intermolecular hydrogen bonding is a new method for synthesis liquid crystals. Some of them was vented by FTIR and studied by DSC or polarized optical microscopy. In this paper, we reported the development of liquid crystals induced by intermolecular hydrogen bonding.Chapter 2: We study the effect of microwave irradiation by the by condensation of benzoin with ammonium acetate in acetic anhydride. We found amarone has been obtained selectively. Moreover, under microwave irradiation, the reaction was finished in shorter time and got the products in high yields reaction ofChapter 3: The synthesis of diacetals from 2,2-bis(hydroxymethyl)-l,3-propanediol with aldehydes and ketones is carried out under microwave irradiation in 80-98%yield with silica sulfate as catalyst. We found microwave irradiation is a useful method in organic reaction.Chapter 4: 10 amide derivatives have been synthesized from 4,4'-diaminoben-zenesulfonanilide. We found that the aromatic amide derivatives containing proper groups at the end of the rod-like molecules were able to form themotropic liquid crystalline phase. Moreover we do some research for the reaction under microwave irradiation.