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
Stereoselective synthesis of 1,3-disubstituted isoindolines via Rh(<scp>iii</scp>)-catalyzed tandem oxidative olefination–cyclization of 4-aryl cyclic sulfamidates
作者:Se-Mi Son、Yeon Ji Seo、Hyeon-Kyu Lee
DOI:10.1039/c5cc09888b
日期:——
Rh(III)-catalyzed tandem ortho C-H olefination of cyclic 4-aryl sulfamidates (1) and subsequent intramolecular cyclization is described. This reaction serves as a method for the direct and stereoselectivesynthesis of 1,3-disubstituted...
Highly enantioselective synthesis of cyclic sulfamidates and sulfamidesviarhodium-catalyzed transfer hydrogenation
作者:Sun Ah Lee、Se Hun Kwak、Kee-In Lee
DOI:10.1039/c0cc04166a
日期:——
We achieved highly enantioselective synthesis of cyclic 1,2-sulfamidates and -sulfamides viarhodium-catalyzed transfer hydrogenation, and also revealed one-pot preparation of cyclic N-sulfonylimines from α-hydroxy ketones.