Direct oxidative conversion of aldehydes and alcohols to 2-imidazolines and 2-oxazolines using molecular iodine

Aldehydes were converted to the corresponding 2-imidazolines and 2-oxazolines in good yields by the reaction with ethylenediamine and aminoethanol, respectively, using molecular iodine and potassium carbonate. Moreover, primary alcohols were directly converted to the corresponding 2-imidazolines and 2-oxazolines via aldehydes in one-pot manner with ethylenediamine and aminoethanol, respectively, using molecular iodine and potassium carbonate.     

基于己内酰胺和乙醇胺的聚酯酰胺合成及表征

以己内酰胺及乙醇胺进行开环聚合,合成了聚酰胺预聚物(PrePA),并采用N,N'-碳酰双己内酰胺(CBC)和1,4-双(2-噁唑啉)苯(PBOX)对其进行了扩链反应.进一步将PrePA与己二酸缩聚,制备了聚酯酰胺预聚体(PrePEA),以CBC和PBOX复合扩链剂扩链,获得了特性黏数达0.74 dL/g的聚酯酰胺.并采用红外、核磁及WAXS对聚合物的结构和晶型进行了表征,以DSC和TGA测定了聚合物的热性能,同时对聚合物的力学性能进行了测定.     

Microwave-assisted amination of 3-bromo-2-chloropyridine with various substituted aminoethanols

A simple method for microwave-assisted amination of 3-bromo-2-chloropyridine with various substituted aminoethanols is described. The reaction was carried out under microwave irradiation conditions (at 180 °C for 1-2 h) and the result was superior in terms of conversion and yield when compared to that of the corresponding conventional heating conditions.