113425-30-2Relevant articles and documents
Study of electronic effect in bifunctional catalysts for the copolymerization of CO2 and PO/CHO
Hu, Yang,Du, Longchao,Li, Cun,Shen, Jiale,Zhu, Weiju,Shao, Chenxi
, p. 1818 - 1826 (2020)
Carbon dioxide (CO2) is an easily available renewable carbon source that can be used as a comonomer in the catalytic ring-opening polymerization of epoxides to form aliphatic polycarbonates. Herein, a series of new Salen-Co(III) bifunctional catalysts were synthesized for the first time, and they were studied to catalyze the copolymerization of CO2 and propylene oxide (PO)/cyclohexene oxide (CHO). At the same time, the effects of reaction conditions (electronic effect, temperature, time) on catalytic activity and selectivity were investigated. The results show that the Salen-Co(III) complexes with electron-withdrawing groups have higher selectivity and activity for propylene carbonate (PPC)/cyclohexylene carbonate (PCHC). At the same time, the Salen-Co(III) complexes can better catalyze the copolymerization of CHO and CO2 than that of PO and CO2. The catalytic efficiency of the four complexes increased with increasing temperature, and the best reaction condition is 80°C, 30 min and 2 MPa of CO2.
PROCESS FOR PRODUCING POLYCARBONATES AND A COORDINATION COMPLEX USED THEREFOR
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Paragraph 0161, (2014/09/16)
The complex of the present invention containing an onium salt and a central Lewis acidic metal has a high catalytic activity at a high temperature for the copolymerization of an epoxide and carbon dioxide to produce a high molecular weight polycarbonate.
A GENERAL ROUTE TO 3-(HYDROXYARYL)TETRAHYDRO PYRIDAZINES AND 1,2-DIAZEPINES AND DERIVATIVES
Kalyanam, N.,Dave, K.G.,Likhate, M.A.
, p. 2183 - 2192 (2007/10/02)
A three step synthesis of 1-acyl-3-(hydroxyaryl)tetrahydro pyridazines and 1,2-diazepines starting from phenols is described.The hydrolytic lability of some intermediate chloroalkyl aryl ketones and a simple recovery of these ketones from nitrobenzene solution are indicated.