One-Pot Preparation of Methyl N-Phenyl Carbamate and Zn(OAc)2/SiO2 Catalyst with Enhanced Stability

被引：2

作者：

Li, Fang ^{[1
]}

Li, Song ^{[1
]}

Jia, Aizhong ^{[1
]}

Gao, Liya ^{[1
]}

Xue, Wei ^{[1
]}

Zhang, Yanhua ^{[1
]}

Wang, Yanji ^{[1
]}

机构：

[1] Hebei Univ Technol, Sch Chem Engn & Technol, Tianjin Key Lab Chem Proc Safety, Hebei Prov Key Lab Green Chem Technol & High Effi, Tianjin 300130, Peoples R China

来源：

CHEMISTRYSELECT | 2019年 / 4卷 / 35期

基金：

中国国家自然科学基金;

关键词：

Aniline; Dimethyl carbonate; Green chemistry; Heterogeneous catalysis; Methyl N-phenyl carbamate; DIMETHYL CARBONATE; ZINC ACETATE; ANILINE; METHOXYCARBONYLATION; EFFICIENT; DIAMINE;

D O I：

10.1002/slct.201902219

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The one-pot preparation of methyl N-phenyl carbamate (MPC) and supported Zn(OAc)(2)/SiO2-OP was investigated. Zn(OAc)(2) and SiO2 were added to the reaction between dimethyl carbonate (DMC) and aniline upon which MPC and Zn(OAc)(2)/SiO2-OP were obtained simultaneously. The co-prepared Zn(OAc)(2)/SiO2-OP showed superior catalytic performance for MPC synthesis, giving a aniline conversion of 96.3% and a MPC selectivity of 99.7%. Compared with catalyst prepared by incipient impregnation, Zn(OAc)(2)/SiO2-OP was more stable during the reaction, and the aniline conversion was 85.0% with MPC selectivity of 88.2% for the seventh time. The catalyst was characterized and the results suggested that Zn(OAc)(2), Zn-5(OH)(8)(OAc)(2).2H(2)O, ZnO and Zn4O(OAc)(6) are present on SiO2 surface. Zn(OAc)(2) and Zn4O(OAc)(6) are the active sites for MPC synthesis. The superior stability of the Zn(OAc)(2)/SiO2-OP catalyst came from the presence of Zn4O(OAc)(6).

引用

页码：10581 / 10586

页数：6

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