5676-66-4Relevant articles and documents
Synthesis of diphenyl carbonate from CO2, phenoxide, and CCl4 with ZnCl2 as catalyst
Li, Zhenhuan,Qin, Zhangfeng,Zhu, Huaqing,Wang, Jianguo
, p. 784 - 785 (2007/10/03)
Direct synthesis of diphenyl carbonate (DPC) from phenoxide, CO2 and CCl4 in one pot was realized with ZnCl2 as catalyst. Trichloromethyl cation may act on potassium phenyl carbonate, which brings the carbonyl more easily attached on by the phenoxide. Onium salts promote the reaction greatly, especially with phenol and potassium carbonate instead of phenoxide as reactants. Moreover, the substituent on the aromatic ring has significant effects on the selectivity and yield of carbonate. Copyright
NOVEL CATALYSIS OF o-NITROPHENYL CARBONATES BY p-DIMETHYLAMINOPYRIDINE
Brunelle, Daniel J.
, p. 1739 - 1742 (2007/10/02)
Transesterification reactions of o-nitrophenyl carbonates have been found to be greatly facilitated by use of p-dialkylaminopyridines as catalysts.A 20-fold rate increase is observed using 0.01 eq. of p-dimethylaminopyridine in place of 2.00 eq. of triethylamine.Such rate enhancement is not observed with p-nitrophenyl carbonates: 2.00 eq. of Et3N causes reaction to occur 8.5 times faster than 0.01 eq. of DMAP.DMAP catalyzed reactions of o-nitrophenyl carbonate have been used to prepare aromatic carbonates at 0 deg C in high yields, and avoid the necessity of using 2 equiv. of base.