40989-96-6Relevant articles and documents
Cage-shaped borate esters with enhanced Lewis acidity and catalytic activity
Yasuda, Makoto,Yoshioka, Sachiko,Yamasaki, Satoshi,Somyo, Toshio,Chiba, Kouji,Baba, Akio
, p. 761 - 764 (2006)
A cage shape causes high Lewis acidity and catalytic activity on boron. Borate esters that have cage-shaped ligands have accessible LUMO with lower eigenvalues than normal open-shaped borate esters. A large dihedral angle at C-O-B-O in cage-shaped borate
Use of Organometallic Complexes of Ruthenium in the Lewis Acid Catalyzed Hetero Diels-Alder Reaction
Faller, J. W.,Smart, C. J.
, p. 1189 - 1192 (1989)
The hetero Diels-Alder reaction between benzaldehyde and a functionalized diene can be catalyzed by the Lewis acid transition metal complexes, PF6 (L=L'=PPh3, or LL'=1,2-bis-diphenylphosphinoethane, (-)-DIOP or (S,S)-CHIRAPHOS).
Synthesis and characterization of sterically crowded aryloxides: ‘Mitsubishi’-class of tetrametallic aluminum complexes
Konishi, Akihito,Nakajima, Hideto,Maruyama, Hikaru,Yoshioka, Sachiko,Baba, Akio,Yasuda, Makoto
, p. 130 - 134 (2017)
A new series of tetrameric aluminum molecules with a Mitsubishi structure, composed of two cage-shaped triphenolic ligands with a tripod-chelated structure, have been synthesized and characterized. Transmetalation from the cage-shaped borates was a proper
Chiral Chromium Salen@rGO as Multipurpose and Recyclable Heterogeneous Catalyst
Abd El Sater, Mariam,Mellah, Mohamed,Dragoe, Diana,Kolodziej, Emilie,Jaber, Nada,Schulz, Emmanuelle
supporting information, p. 9454 - 9460 (2021/05/26)
The first immobilization of a pyrene-tagged chromium salen complex through π-π noncovalent interactions on reduced graphene oxide (rGO) is described. A very robust supported catalytic system is obtained to promote asymmetric catalysis in repeated cycles, without loss of activity or enantioselectivity. This specific behavior was demonstrated in two different catalytic reactions (up to ten reuses) promoted by chromium salen complexes, the cyclohexene oxide ring-opening reaction and the hetero-Diels-Alder cycloaddition between various aldehydes and Danishefsky's diene. Furthermore, the chiral chromium salen@rGO has been found to be compatible with a multi-substrate type use, in which the structure of the substrate involved is modified each time the catalyst is reused.
Catalytic asymmetric oxo-Diels-Alder reactions with chiral atropisomeric biphenyl diols
Yeung, Chi-Tung,Chan, Wesley Ting Kwok,Lo, Wai-Sum,Law, Ga-Lai,Wong, Wing-Tak
supporting information, p. 955 - 962 (2019/06/08)
New chiral atropisomeric biphenyl diols 3, 4 and 6 containing additional peripheral chiral centers with different steric bulkiness and/or electronic properties were synthesized. The X-ray crystal structure of 3 shows the formation of a supramolecular stru
Synthesis of Cage-Shaped Aluminum Aryloxides: Efficient Lewis Acid Catalyst for Stereoselective Glycosylation Driven by Flexible Shift of Four- To Five-Coordination
Tanaka, Daiki,Kadonaga, Yuichiro,Manabe, Yoshiyuki,Fukase, Koichi,Sasaya, Shota,Maruyama, Hikaru,Nishimura, Sota,Yanagihara, Mayu,Konishi, Akihito,Yasuda, Makoto
supporting information, p. 17466 - 17471 (2019/10/14)
Monomeric cage-shaped aluminum aryl oxides 1Al were synthesized using tripodal triphenolic ligands. The Lewis acidity and catalytic activity of the obtained 1Al·py were investigated. The Lewis acidity of 1Al·py originates from the flexible change in the c
