14027-78-2Relevant articles and documents
Diphosphine compound, catalyst system containing diphosphine compound and application of diphosphine compound
-
Paragraph 0110-0117, (2021/03/13)
The present invention provides a diphosphine compound, a catalyst system containing the same, and applications of the diphosphine compound, the diphosphine compound has a structure represented by a formula I or a formula II, a phosphorus atom and a benzene ring are connected through methylene, and a nitrogen-containing heteroaryl structure is matched, such that carbon monoxide can be easily activated after phosphorus and a metal are coordinated, and an alkoxy carbonylation reaction is facilitated. The catalyst system comprises a bimetallic catalyst and the diphosphine compound, and when the catalyst system is used for catalyzing conjugated olefin to prepare 1, 6-dicarboxylic ester compounds, the conversion rate of raw materials can be effectively improved, and the yield and regioselectivity of products are improved.
Biomass-derived dibasic acids to diesters with inorganic ligand-supported catalyst: synthesis, optimization, characterization
Chen, Zhe,Han, Sheng,Lu, Deli,Xu, Yumeng
, (2021/08/23)
Several attempts have been made to obtain aliphatic dicarboxylic diesters from esterification reaction to develop the biomass-derived platform molecules and green manufacturing processes. In this paper, Na3(H2O)6[AlMo6O18(OH)6], an Anderson-type polyoxometalate, firstly, was reported as a catalyst for diester synthesis from dicarboxylic acid to diester which showed an well productivity and selectivity characterized by 1H and 13C. Response surface methodology (RSM) integrated with the desirability function approach was used to determine the best operative conditions, and the optimal reaction parameters for maximum dipropyl succinate yield (77 ± 2.5%) were identified as 1.19?mol.% catalyst loading, 4.9:1 propanol/succinic acid ratio, 113?°C, and 9.6?h. Three batches of tests were carried for catalyst recycling with 78–75% yield even after 6 cycles of esterification. In addition, the substrate carbon chain was increased for investigation of substrate scope achieving satisfactory results and all products were characterized by 1H and 13C nuclear magnetic resonance spectroscopy.
Direct synthesis of adipic acid esters via palladium-catalyzed carbonylation of 1,3-dienes
Yang, Ji,Liu, Jiawang,Neumann, Helfried,Franke, Robert,Jackstell, Ralf,Beller, Matthias
, p. 1514 - 1517 (2020/01/08)
The direct carbonylation of 1,3-butadiene offers the potential for a more cost-efficient and environmentally benign route to industrially important adipic acid derivatives. However, owing to the complex reaction network of regioisomeric carbonylation and isomerization pathways, a selective practical catalyst for this process has thus far proven elusive. Here, we report the design of a pyridyl-substituted bidentate phosphine ligand (HeMaRaphos) that, upon coordination to palladium, catalyzes adipate diester formation from 1,3-butadiene, carbon monoxide, and butanol with 97% selectivity and 100% atom-economy under industrially viable and scalable conditions (turnover number > 60,000). This catalyst system also affords access to a variety of other di- and triesters from 1,2- and 1,3-dienes.
