Results 81 to 90 of about 6,893 (205)

A domino reaction for generating β-aryl aldehydes from alkynes by substrate recognition catalysis

Nature Communications, 2019
Supramolecular interactions may be responsible for higher degree of efficiency and selectivity in homogeneous catalysis. Here, the authors exploit the concept of supramolecular catalysis to develop a domino rhodium-catalyzed hydroformylation of α ...
Weiwei Fang, Felix Bauer, Yaxi Dong, Bernhard Breit   +3 more
doaj   +1 more source

Asymmetric Olefines Hydroformylation III: Asymmetric Induction by Rhodium Complexes Using (—)-2,3-O-Isopropylidene- 2,3-Dihydroxy-1,4-Bis(Diphenylphosphino)Butane as Chiral Ligand

CHIMIA, 1973
RhH(CO)(PPh3)3 in the presence of (—)-DIOP promotes asymmetric hydroformylation of aromatic olefines at atmospheric pressure and low temperature ; the asymmetric induction reaches in the case of styrene 25%.  DIOP: abbreviation for 2,3-O-isopropylidene-
Christian Salomon, Giambattista Consiglio, Carlo Botteghi, Piero Pino   +3 more
doaj   +1 more source

Bio-inspired creation of heterogeneous reaction vessels via polymerization of supramolecular ion pair

Nature Communications, 2019
Tuning the environment of catalytic active sites may improve the selectivity of heterogeneous catalysts. Here, the authors modify the outer-sphere environment of active sites in hydroformylation catalysts by encapsulating the active sites in nanovessels ...
Ke Dong, Qi Sun, Yongquan Tang, Chuan Shan, Briana Aguila, Sai Wang, Xiangju Meng, Shengqian Ma, Feng-Shou Xiao   +8 more
doaj   +1 more source

Study on catalysts and reaction process for highly selective hydroformylation of 1-octene

上海师范大学学报. 自然科学版
Using rhodium dicarbonylacetylacetonate as the rhodium(Rh) catalyst precursor, the catalytic performances of different monodentate and bidentate phosphine ligands, bisphosphite ligands, and the self-synthesized ligand system Rh-L9 were investigated in ...
YANG Xushi, ZHANG Shuangshuang, BAI Ruiqi, CHEN Yili, LIU Kaihong, LAI Chunbo   +5 more
doaj   +1 more source

Research Progress on Preparation Technology and Applications of Bis(hydroxymethyl)tricyclodecane

Chemistry
Polymers based on tricyclic decane skeleton in the role of high-performance polycarbon, polyester, polyacrylate, etc., are used in optical equipment, dental restoration, photoresist, and other fields because of their rigid ring structure and ...
Yi Xia, Rong Fan, Dansen Shang, Xinrong Yao, Xi Liu, Zhuo Yi   +5 more
doaj   +1 more source

Phosphinocyclodextrins as confining units for catalytic metal centres. Applications to carbon–carbon bond forming reactions

Beilstein Journal of Organic Chemistry, 2014
The capacity of two cavity-shaped ligands, HUGPHOS-1 and HUGPHOS-2, to generate exclusively singly phosphorus-ligated complexes, in which the cyclodextrin cavity tightly wraps around the metal centre, was explored with a number of late transition metal ...
Matthieu Jouffroy, Rafael Gramage-Doria, David Sémeril, Dominique Armspach, Dominique Matt, Werner Oberhauser, Loïc Toupet   +6 more
doaj   +1 more source

Monofluorophos–Metal Complexes: Ripe for Future Discoveries in Homogeneous Catalysis

Molecules
The discovery that cyclic (ArO)2PF can support Rh-catalysts for hydroformylation with significant advantages in tuning regioselectivity transformed the study of metal complexes of monofluorophos ligands from one of primarily academic interest to one with
Alexandra M. Miles-Hobbs, Paul G. Pringle, J. Derek Woollins, Daniel Good   +3 more
doaj   +1 more source

Synthesis of (–)-Indolizidine 167B based on domino hydroformylation/cyclization reactions

Beilstein Journal of Organic Chemistry, 2008
The synthesis of (–)-Indolizidine 167B has been achieved from optically active (R)-3-(pyrrol-1-yl)hex-1-ene. The key step is a highly regioselective hydroformylation reaction and a one-pot intramolecular cyclization providing a general approach to the ...
Giuditta Guazzelli, Raffaello Lazzaroni, Roberta Settambolo   +2 more
doaj   +1 more source

Study of the hydroformylation of 2,5-dihydrofuran catalyzed by rhodium diphosphine complexes

, 2001
Rhodium diphosphine systems, including chiral ones, were used as catalyst precursors for the hydroformylation of 2,5-dihydrofuran. The effect of the reaction conditions and the bite angle on the activity and selectivity of the reaction were studied. The
Piet WNM van Leeuwen, Inmaculada del Río, Carmen Claver   +2 more
core   +1 more source

Theoretical Study of Selectivity of Ethylene Hydroformylation on Rh(111) and Rh@Cu(111) Surfaces

, 2012
Selectivity-determining steps for ethylene hydroformylation, i.e., ethyl hydrogenation versus CO insertion on Rh(111) and Rh@Cu(111) surfaces were investigated by density functional theory calculations.
Ma Xiufang, Su Haiyan, Li Weixue, Zhao Yonghui   +3 more
core   +1 more source