Da‐Ming Du

Beijing Institute of Technology

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Jiaxi Xu

Beijing University of Chemical Technology

Bo‐Liang Zhao

Beijing Institute of Technology

Wen Yang

Ministry of Education of the People's Republic of China

Wenting Hua

Gansu Provincial Hospital

Han Liu

Northwestern University

Shao‐Feng Lu

China Earthquake Administration

Bo-Liang Zhao

Jiaxi Xu

King Abdullah University of Science and Technology

Junhua Li

Changzhou University

Yu Gao

Yunnan Agricultural University

Cooperative Institutions

Chinese Academy of Sciences

Peking University

Beijing Institute of Technology

Nankai University

Shenzhen University

University of Chinese Academy of Sciences

Tsinghua University

Beijing National Laboratory for Molecular Sciences

State Council of the People's Republic of China

Shanghai Jiao Tong University

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Comparative Spectroscopic and Electrochemical Properties of Bis(octakis(dodecylthio)naphthalocyaninato)europium(III) and Bis(tetra-tert-butylnaphthalocyaninato)europium(III) Complexes

Inorganic Chemistry (1999)

Tebello Nyokong Fumio Furuya Nagao Kobayashi Da‐Ming Du Wei Liu

Bis(substituted-2,3-naphthalocyaninato)europium(III) complexes: bis(octakis(dodecylthio)-2,3-naphthalocyaninato)europium(III) (Eu[2,3-Nc(SC12H25)8]2, 1) and bis(tetra-tert-butyl-2,3- naphthalocyaninato)europium(III) (Eu[2,3-Nc(t-Bu)4]2, 2) have been synthesized by cyclic tetramerization of naphthalonitriles with Eu(acac)3.H2O in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in refluxing n-octanol. These compounds were characterized by UV-visible, magnetic circular dichroism (MCD), near-IR, IR, EPR, and mass spectroscopies. The absorption and MCD spectra of 1 showed splitting of the Q band, with peaks at 700 and 784 nm, red shifted from the Q band of 2 at 763 nm. The absorption and MCD spectral band deconvolution calculations of complex 1 gave two A terms in the Q-band region. The A terms are assigned to 2A2-->2E1 transitions. Cyclic voltammograms of 1 and 2 showed reversible oxidation couples at E1/2 = -0.28 V (for 2) and -0.25 V (for 1) vs ferrocenium/ferrocene (Fc+/Fc). The second oxidation exhibited a complicated behavior for both complexes. The reduction couples for 2 were observed at E1/2 = -0.61, -1.64, -1.97, and -2.42 V, and for 1 they were observed at E1/2 = -0.62, -1.60, -1.86, and -2.27 V vs Fc+/Fc. Spectral changes observed on chemical oxidation and reduction of the complexes are presented, and the behaviors of 1 and 2 are compared.

Europium

Tetra

10.1021/ic990483b

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Citations (47)

Ligand and substrate π-stacking interaction controlled enantioselectivity in the asymmetric aziridination

Tetrahedron Asymmetry (2007)

Linge Ma Peng Jiao Qihan Zhang Da‐Ming Du Jiaxi Xu

Oxazoline

Electronic effect

10.1016/j.tetasy.2007.03.032

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Citations (46)

Squaramide-catalyzed asymmetric Michael/cyclization cascade reaction of 3-isothiocyanato oxindoles with chalcones for synthesis of pyrrolidinyl spirooxindoles

Organic Chemistry Frontiers (2017)

Ye Lin Lei Liu Da‐Ming Du

An efficient method for the construction of pyrrolidinyl spirooxindoles with 3-isothiocyanato oxindoles and chalcones via a Michael/cyclization cascade reaction has been developed using squaramide. The products were obtained in high yields with excellent stereo selectivities.

Squaramide

Michael reaction

Cascade reaction

10.1039/c6qo00852f

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ChemInform Abstract: Enantioselective Synthesis of Chiral Heterocycles Containing Both Chroman and Pyrazolone Derivatives Catalyzed by a Chiral Squaramide.

ChemInform (2015)

Junhua Li Da‐Ming Du

Abstract A squaramide‐catalyzed diastereoselective and enantioselective Michael addition of pyrazolin‐5‐ones to 3‐nitro‐2H‐chromenes is developed.

Squaramide

Pyrazolones

Michael reaction

10.1002/chin.201540147

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Squaramide-Catalyzed Asymmetric Mannich/Hemiketalization Retro-Henry Cascade Reaction of o-Hydroxy-α-Aminosulfones with α-Nitroketones

The Journal of Organic Chemistry (2025)

Rong-Rong Zhu Xi‐Qiang Hou Da‐Ming Du

A concise and efficient asymmetric Mannich/hemiketalization/retro-Henry cascade reaction between o-hydroxy-α-aminosulfones and α-nitroketones was developed by utilizing a cinchona-derived bifunctional squaramide catalyst. This methodology provided access to β-nitro-substituted amino compounds with up to 95% yield and >99% ee. The practicality was demonstrated by scale-up and diverse derivatizations, including the synthesis of imidazolidinone and amino acid analogs. This is the first report of α-nitroketones in such a cascade reaction, offering a valuable approach for the synthesis of chiral β-nitro amino compounds.

Squaramide

Mannich reaction

Nitroaldol reaction

Cascade reaction

10.1021/acs.joc.4c02491

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ChemInform Abstract: Rational Tuning of the Rigidity of a Ligand Scaffold: Synthesis of Diphenylsulfide‐Linked Bis(oxazoline) Ligands and Their Application in Asymmetric Allylic Alkylation.

ChemInform (2010)

Xian Du Han Liu Da‐Ming Du

Abstract It is found that the oxazolines (I) efficiently promote the enantioselective allylic alkylation.

Tsuji–Trost reaction

Oxazoline

Rigidity (electromagnetism)

10.1002/chin.201033024

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Rational Tuning Chelate Size of Bis‐oxazoline Ligands to Improve Enantioselectivity in the Asymmetric Aziridination of Chalcones.

ChemInform (2006)

Linge Ma Da‐Ming Du Jiaxi Xu

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Oxazoline

10.1002/chin.200614111

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Effect of Microwave Irradiation on the Syn/Trans Selectivity in the Formation of β-Lactams From Ketenes and Imines

Journal of Liaoning University of Petroleum & Chemical Technology (2006)

Da‐Ming Du

To study the effect of the microwave irradiation on the syn/trans selectivity in the formation of β-lactams from ketenes and imines,the syn/trans ratios of β-lactams generated from imines and ketenes yielded from S-phenyl 2-diazoethanethioate under classical heating and microwave irradiation conditions at the same temperature were determined via NMR.The effect of the microwave irradiation on the syn/trans selectivity in this reaction was investigated.The results indicate that the microwave irradiation affects the selectivity slightly.Cis products increase in nonpolar toluene and trans products increase in polar acetonitrile.

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Recent Advances in the Synthesis of 2‐Imidazolines and Their Applications in Homogeneous Catalysis

Advanced Synthesis & Catalysis (2009)

Han Liu Da‐Ming Du

Abstract magnified image As an important class of heterocyclic scaffolds, 2‐imidazolines have attracted the attention from the chemists interested in natural products, pharmaceutical chemistry, synthetic organic chemistry, coordination chemistry, and homogeneous catalysis. To fulfill the demand of structural diversity, many efficient methods towards 2‐imidazolines, as well as modifications of traditional methods, have been reported in the past two decades. 2‐Imidazolines have been developed as ligands in homogeneous catalysis, for the substitution on the nitrogen atom that provides an opportunity for fine‐tuning of the electronic effect. This review summarizes recent advances in the synthesis of 2‐imidazolines and their applications in homogeneous catalysis.

Homogeneous Catalysis

Atom economy

Nitrogen atom

10.1002/adsc.200800797

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Citations (140)

Catalytic Asymmetric Mannich/Cyclization of 2-Isothiocyanato-1-indanones: An Approach to the Synthesis of Bispirocyclic Indanone–Thioimidazolidine–Oxindoles

Organic Letters (2018)

Bo‐Liang Zhao Da‐Ming Du

This study demonstrates that novel isothiocyanates derived from 1-indanones are useful building blocks in heteroannulation reactions with isatinimines. This convenient Mannich/cyclization cascade reaction serves as a powerful tool for the enantioselective construction of bispirocyclic indanone–thioimidazolidine–oxindoles bearing two adjacent spiro-quaternary stereocenters in good to excellent yields with excellent diastereo- and enantioselectivities. Versatile transformations of the products into other potential bioactive bispirocyclic heterocycles have also been demonstrated.

Mannich reaction

10.1021/acs.orglett.8b01389

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Citations (33)