Results 201 to 210 of about 3,273,294 (390)

Asymmetric .ALPHA.-substituted phenethylamines. II. The enantioselective synthesis of 1-aryl-2-phenylethylamines from L- and D-amino acids by means of 1,3-asymmetric induction.

, 1983
Yuji Suzuki, Hiroshi Takahashi
openalex   +2 more sources

Notizen: Enantioselective Catalysis, 101 [1] Synthesis and Coordination Properties of (3′S,4′S)-(+)-1,2-Bis(3′,4′-dimethoxyphospholano)benzene, a N ew Chiral Diphosphane [PDF]

, 1996
Henri Brunner, Gemma Net
openalex   +1 more source

Enantiomerically Enriched Aziridine‐2‐carboxylates via Copper‐Catalyzed Reductive Kinetic Resolution of 2H‐Azirines

Angewandte Chemie International Edition, Accepted Article.
We present the first reductive kinetic resolution of racemic 2H‐azirines to prepare optically enriched N‐H aziridine‐2‐carboxylates, which are bench stable and easily diversifiable building blocks, concomitantly with the corresponding enantiomerically enriched 2H‐azirines. The N‐H aziridines were obtained with excellent diastereoselectivity (>20:1) and
Yinuo Zheng, Elvis Wang Hei NG, Antonio Rizzo, Pauline Chiu   +3 more
wiley   +1 more source

A Common Active Intermediate in the Oxidation of Alkenes, Alcohols and Alkanes with H2O2 and a Mn(II)/Pyridin‐2‐Carboxylato Catalyst

ChemCatChem, Volume 15, Issue 1, January 9, 2023., 2023
Manganese oxidation chemistry: In line solution and head space Raman spectroscopy combined with 18O atom tracking reveal a common reactive species in the manganese‐pyridine carboxylic acid catalysed oxidation of alkenes, alkanes and alcohols and unexpected disproportionation of H2O2.
Johann B. Kasper, Pattama Saisaha, Maurits de Roo, Mitchell J. Groen, Laia Vicens, Margarida Borrell, Johannes W. de Boer, Ronald Hage, Miquel Costas, Wesley R. Browne   +9 more
wiley   +1 more source

An Approach to the Enantioselective Synthesis of 2-Azabicyclo[2.2.1]hept-5-en-3-one

, 1988
Franco Fernández, Eugenio Uriarte, Olga Caamaño, A. EIRIN, Generosa Gómez   +4 more
openalex   +1 more source

Optimised Protocol for Drying Aqueous Enzyme Solutions in Organic Solvents – Comparison of Free and Immobilised Candida antarctica Lipase B

ChemCatChem, Volume 15, Issue 1, January 9, 2023., 2023
Protocol for Drying Aqueous Enzyme Solution: An optimised protocol for drying of soluble lipases in organic solvents is presented, and the study highlights the importance of controlling water activity in reaction mixtures when lipase characteristics are investigated.
Helena D. Tjørnelund, Jesper Brask, John M. Woodley, Günther H. J. Peters   +3 more
wiley   +1 more source

Synthetic studies on spiroketal natural products. II. An enantioselective synthesis of (R)- and (S)-1,7-dioxaspiro[5.5]undecane.

, 1988
C. IWATA, Masahiro Fujita, Toshio Kuroki, Kohji Hattori, Shuji Uchida, Takeshi Imanishi   +5 more
openalex   +2 more sources

Enantioselective total synthesis of (−)-α-kainic acid [PDF]

, 1998
Mario D. Bachi, Artem Melman
openalex   +1 more source

Tailored Particle Catalysts for Multistep One‐pot Chemoenzymatic Cascade in Pickering Emulsions

ChemCatChem, Volume 15, Issue 1, January 9, 2023., 2023
Chemoenzymatic cascades are enabled by combining particle catalysts and enzymes in water and Pickering emulsions in a sequential fashion. The benefit of such multistep one‐pot chemoenzymatic cascades is their high reactivity, selectivity, and recyclability without reaction incompatibility issues.
Shan Wang, Luca Scandurra, René Hübner, Ulla Gro Nielsen, Changzhu Wu   +4 more
wiley   +1 more source

An Enantioselective Synthesis of 1-(a-Hydroxyalkyl)-1,2,3,4-tetrahydroisoquinolines through Optically Active N-Oxaacyliminium Ion Intermediates

, 1985
Shinzo Kano, Yoko Yuasa, Shiroshi Shibuya   +2 more
openalex   +1 more source