Dynamic kinetic resolution in the stereoselective synthesis of 4,5-diaryl cyclic sulfamidates by using chiral rhodium-catalyzed asymmetric transfer hydrogenation
作者:Juae Han、Soyeong Kang、Hyeon-Kyu Lee
DOI:10.1039/c0cc05289b
日期:——
The dynamic kinetic resolution of 4,5-diaryl cyclic sulfamidate imines was achieved via asymmetric transfer hydrogenation using a HCO(2)H/Et(3)N mixture as the hydrogen source and chiral Rh catalysts (R,R)- or (S,S)-RhCl(TsDPEN)Cp* affording the corresponding cyclic sulfamidates in good yields with up to >20 : 1 dr and up to >99% ee.
Copper-Catalyzed Regio- and Stereoselective Ring-Opening of Cyclic Sulfamidates with Grignard Reagents assisted by Lithium Chloride
作者:Pitchaiah Arigala、Venkata S. Sadu、In-Taek Hwang、Jin-Soo Hwang、Chul-Ung Kim、Kee-In Lee
DOI:10.1002/adsc.201400850
日期:2015.6.15
Copper‐catalyzed ring‐opening reactions of cyclic 1,2‐sulfamidates with a wide range of Grignard reagents have been investigated. The use of lithium chloride as an additive is essential to activate CO bond cleavage. The reaction represents highly regio‐ and stereoselective, and thus allows for efficient synthesis of enantioenriched α‐branched benzylamine derivatives. Furthermore, we demonstrated that
Large-scale preparation of key building blocks for the manufacture of fully synthetic macrolide antibiotics
作者:Philip C Hogan、Chi-Li Chen、Kristen M Mulvihill、Jonathan F Lawrence、Eric Moorhead、Jens Rickmeier、Andrew G Myers
DOI:10.1038/ja.2017.116
日期:2018.2
Key building blocks for the production of fully synthetic macrolides have been scaled-up in first time pilot plant and kilo-lab campaigns. These building blocks have supported the discovery of new macrolide antibiotics as well as ongoing preclinical studies.
全合成大环内酯的生产关键组分首次在 pilot plant 和小规模试验中进行了扩大生产。这些关键组分不仅支持了新型大环内酯抗生素的发现,也为正在进行的前临床研究提供了支持。