Highly efficient and selective synthesis of dibutyl carbonate via the synergistic dual activation catalysis of tetraethylammonium prolinate ionic liquids

作者：Ouyang, Fan; Wang, Zhen-Zhen; Zhou, Yan; Cheng, Zheng; Lu, Zhang-Hui; Yang, Zhen; Tao, Duan-Jian^*

来源：Applied Catalysis A: General , 2015, 492: 177-183.

DOI：10.1016/j.apcata.2014.12.037

• Dibutyl carbonate
• Dimethyl carbonate
• Ionic liquid
• Transesterification

A facile, highly efficient and phosgene-free synthesis process of dimethyl carbonate (DMC) with nbutanol (BuOH) to dibutyl carbonate (DBC) by transesterification reaction has been studied in detail using tetraethylammonium-based amino acid ionic liquids ([N-2222][AA]) as homogeneous catalysts. The results indicated that tetraethylammonium prolinate ([N-2222]Prol) exhibited the best catalytic activity in compared to other four [N-2222][AA], and DBC could be obtained at a yield of 72% under optimum conditions. Furthermore, quantum-mechanical calculations manifested that such high DBC yield originated from the synergistic dual activation catalysis of [N-2222][Pro]. [N-2222][Pro] could activate BuOH and DMC well at the same time, which enhances the electrophilicity of BuOH and the nucleophilicity of DMC respectively, leading to the excellence catalytic performance.

• 出版日期2015-2-25
• 单位江西师范大学