Samarium Diiodide-Induced Asymmetric Synthesis of Optically Pure Unsymmetrical Vicinal Diamines by Reductive Cross-Coupling of Nitrones with <i>N</i>-<i>tert</i>-Butanesulfinyl Imines
作者:Yu-Wu Zhong、Ming-Hua Xu、Guo-Qiang Lin
DOI:10.1021/ol048444d
日期:2004.10.1
[reaction: see text] An efficient method for the preparation of opticallypure unsymmetrical vicinal diamines by the SmI(2)-induced reductive cross-coupling of nitrones with chiral N-tert-butanesulfinyl imines was developed. This is the first successful example of the highly diastereoselective and enantioselective cross-coupling between two different imine species. It provides a straightforward access
the highly diastereoselective synthesis of chiral homoallylic amines by Zn-mediated allylation of chiral N-tert-butanesulfinyl imines at room temperature was developed. By simply tuning the reaction conditions, the method allows the achievement of a highly remarkable opposite stereocontrol, affording the desired stereochemical outcome in good yield and with excellent diastereoselectivity (up to 98%
Highly Diastereoselective and Enantioselective Synthesis of Enantiopure <i>C</i><sub>2</sub>-Symmetrical Vicinal Diamines by Reductive Homocoupling of Chiral <i>N-tert-</i>Butanesulfinyl Imines
作者:Yu-Wu Zhong、Kenji Izumi、Ming-Hua Xu、Guo-Qiang Lin
DOI:10.1021/ol0479803
日期:2004.12.1
[reaction: see text] An efficient and straightforward method for the preparation of highly enantiomerically enriched C2-symmetrical vicinaldiamines by the reductive homocoupling of aromatic N-tert-butanesulfinyl imines in the presence of SmI2 and HMPA was developed. It gives access to a variety of enantiopure C2-symmetrical 1,2-diamines in a very mild and practical way.
Telluronium Salts Mediated Aziridination of Chiral <i>N</i>-<i>tert</i>-Butylsulfinylimines: Highly Stereoselective Synthesis of Optically Active Vinylaziridines
作者:Jun-Cheng Zheng、Wei-Wei Liao、Xiao-Xia Sun、Xiu-Li Sun、Yong Tang、Li-Xin Dai、Jin-Geng Deng
DOI:10.1021/ol051921n
日期:2005.12.1
[reaction: see text] Optically active cis-2-substituted vinylaziridines are synthesized by the reaction of N-tert-butylsulfinylimines with telluroniumylides with excellent diastereoselectivity in good to excellent yields.
Diastereoselective Cyanomethylation of Chiral<i>N</i>-(<i>tert</i>-Butylsulfinyl)imines Promoted by Lewis Bases
作者:Teruaki Mukaiyama、Makoto Michida
DOI:10.1246/cl.2007.1244
日期:2007.10.5
Cyanomethylation of chiral N-(tert-butylsulfinyl)imines with 2-trimethylsilylacetonitrile (TMSCH2CN) in the presence of a Lewis base such as tetrabutylammonium phenoxide (PhONn-Bu4) proceeds smoothly to afford the corresponding β-amino nitriles in good to high yields with excellent diastereoselectivities.