Results 11 to 20 of about 19,176 (260)

Oxamidation of Unsaturated Hydrozamates: Diastereoselectivity and Synthetic Application.

, 2010
Oxamidation of Unsaturated Hydrozamates: Diastereoselectivity and Synthetic ...
Samanthi L. Waidyarachchi (3341402)
core   +6 more sources

Cobalt-Catalyzed Asymmetric Construction of Boron Stereocenters With C-N Axial Chirality. [PDF]

Adv Sci (Weinh)
A cobalt/Salox‐catalyzed one‐pot annulation enables enantioselective formation of B‐stereogenic centers and C─N axial chirality via C─H/N─H annulation, affording diverse fluorescent products with high stereocontrol and optoelectronic potential. ABSTRACT The efficient construction of boron stereogenic centers alongside axial chirality remains a ...
Kumaran S, Ravi Sankar HS, Maity P, Premkumar JR, Das A, Sundararaju B.   +5 more
europepmc   +2 more sources

Diastereoselectivity Control of the Radical Carboazidation of Substituted Methylenecyclohexanes

, 2016
A systematic study of the diastereoselectivity of the radical carboazidation of methylenecyclohexane derivatives is presented. Several substitution patterns leading to a high level of stereocontrol have been identified.
Philippe Renaud (201179), Pascal Schär (2379859), Kurt Schenk (2168791), Sylvaine Cren (2379862)   +3 more
core   +4 more sources

Lithiation and Trapping of Acyclic Sulfoximines: Scope and Diastereoselectivity [PDF]

, 2019
This thesis describes the diastereoselective synthesis of a wide range of α-functionalised acyclic sulfoximines via lithiation-trapping methodology. The diastereoselective synthesis of some tetrasubstituted sulfoximines is also presented.
Hindle, Alexandra
core   +5 more sources

Studies on the Synthesis of DMAP Derivatives by Diastereoselective Ugi Reactions

Molecules, 2011
Diastereoselective Ugi reactions of DMAP-based aldehydes with α-amino acids and tert-butyl isocyanide were examined. The reactions of 4-(dimethylamino)-2-pyridine-carboxaldehyde with various α-amino acids afforded 2-substituted DMAP derivatives with low ...
Koichi Mitsudo, Seiji Suga, Hiroki Mandai, Shunsuke Irie   +3 more
doaj   +1 more source

Diastereoselective Cascade Cyclization of Diazoimides with Alkylidene Pyrazolones for Preparation of Pyrazole-Fused Oxa-Bridged Oxazocines

Molecules, 2023
Under the catalysis of Rh2(OAc)4 (10 mol%) and binapbisphosphine ligand (±)-L3 (20 mol%) in DCE at 80 °C, the cascade cyclization of diazoimides with alkylidenepyrazolones underwent stereoselectively (dr > 20:1), affording pyrazole-fused oxa-bridged ...
Kuo Wang, Yue Zhang, Lu-Yu Cai, Xiu-Qing Song, Chen Wang, Jia-Rui Zhang, Yi-Fan Pan, Hong-Wu Zhao   +7 more
doaj   +1 more source

Felkin-Anh Model from an Orbital Phase Perspective: Diastereoselectivity in Nucleophilic Addition to 2,3-Bis(trifluoromethyl)bicyclo[2.2.1]heptan-7-one [PDF]

, 2019
To address the electronic effect in nucleophilic addition, we often use the Felkin-Anh model, in which the most sigma-electron-withdrawing group (.sigma.EWG) at the a-position of the carbonyl should be located anti to the nucleophile approach.
Yuji, Naruse, Hayata, Hibino, Atsushi, Takamori   +2 more
core   +1 more source

New Advances in the Synthetic Application of Enantiomeric 1-Phenylethylamine (α-PEA): Privileged Chiral Inducer and Auxiliary

Molecules, 2020
New developments in the synthesis, resolution, and synthetic applications of chiral 1-phenylethylamine (α-PEA) reported in the last decade have been reviewed. In particular, improvements in the synthesis of α-PEA and its derivatives and chiral resolution,
Marzena Wosińska-Hrydczuk, Jacek Skarżewski   +1 more
doaj   +1 more source

Highly stereocontrolled total synthesis of racemic codonopsinol B through isoxazolidine-4,5-diol vinylation

Beilstein Journal of Organic Chemistry, 2021
A new highly diastereoselective synthesis of the polyhydroxylated pyrrolidine alkaloid (±)-codonopsinol B and its N-nor-methyl analogue, starting from achiral materials, is presented.
Lukáš Ďurina, Anna Ďurinová, František Trejtnar, Ľuboš Janotka, Lucia Messingerová, Jana Doháňošová, Ján Moncol, Róbert Fischer   +7 more
doaj   +1 more source

Diastereoselective Three-Component Reactions of Chiral Nickel(II) Glycinate for Convenient Synthesis of Novel α-Amino-β-Substituted-γ,γ-Disubstituted Butyric Acids

Molecules, 2014
The convenient, high yielding and diastereoselective synthesis of α-amino-β-substituted-γ,γ-disubstituted butyric acid derivatives was carried out by a three-component tandem reaction of a chiral equivalent of nucleophilic glycine.
Rui Zhou, Li Guo, Cheng Peng, Gu He, Liang Ouyang, Wei Huang   +5 more
doaj   +1 more source