Abstract A solvent-free, versatile procedure has been developed for the effective synthesis of tert-butanesulfinylimines of a variety of aldehydes using chiral tert-butanesulfinamides under green, sonochemical conditions. This method utilizes silica supported p-toluenesulfonic acid (pTSA·SiO2) as an efficient, safer and inexpensive catalystunder aerobic conditions. The practicable simplicity, easy
Microwave-Assisted Solvent-Free Synthesis of Enantiomerically Pure <i>N</i>-(<i>tert</i>-Butylsulfinyl)imines
作者:Juan F. Collados、Estefanía Toledano、David Guijarro、Miguel Yus
DOI:10.1021/jo300919x
日期:2012.7.6
environmentally friendly, and very efficient procedure for the synthesis of opticallypureN-(tert-butylsulfinyl)imines has been developed with microwave-promoted condensation of aldehydes and ketones using (R)-2-methylpropane-2-sulfinamide in the presence of Ti(OEt)4, under solvent-free conditions. This procedure allows for the preparation of a variety of sulfinyl aldimines with excellent yields and purities
Highly efficient asymmetric construction of novel indolines and tetrahydroquinoline derivatives <i>via</i> aza-Barbier/C–N coupling reaction
作者:Tao Guo、Bin-Hua Yuan、Wen-Jie Liu
DOI:10.1039/c7ob02891a
日期:——
Highly stereoselectivesyntheses of chiral indolines and tetrahydroquinolines are achieved by combining the asymmetric Zn-mediated allylation of chiral N-tert-butanesulfinyl imines with efficient intramolecular C–N cross-coupling. Herein, the advantages of such a synthetic strategy are illustrated by the synthesis of indolines and tetrahydroquinolines with quaternary stereocenters and multi-substituted
Asymmetric cinnamylation of N-tert-butanesulfinyl imines with cinnamyl acetates: total syntheses of (+)-lycoricidine and (+)-7-deoxypancratistatin
作者:Sen-Lin Cai、Bin-Hua Yuan、Yi-Xiang Jiang、Guo-Qiang Lin、Xing-Wen Sun
DOI:10.1039/c7cc00108h
日期:——
A highly diastereoselective palladium catalyzed cinnamylation of N-tert-butanesulfinyl imines with cinnamyl acetates has been established to provide enantioenriched [small beta]-aryl homoallylic amines. The synthetic application of this stragety has been successfully...
Asymmetric Synthesis of Amines by the Knochel-Type MgCl<sub>2</sub>-Enhanced Addition of Benzyl Zinc Reagents to <i>N</i>-<i>tert</i>-Butanesulfinyl Aldimines
作者:Andrew W. Buesking、Tyler D. Baguley、Jonathan A. Ellman
DOI:10.1021/ol103002t
日期:2011.3.4
The MgCl2-enhanced addition of benzyl zinc reagents to N-tert-butanesulfinyl imines proceeds readily at room temperature to afford the N-tert-butanesulfinyl-protected amine products in good yields and diastereomeric ratios. This method is functional group tolerant in both the imine substrate and benzyl zinc coupling partner. Moreover, benzyl zinc reagentaddition to the N-tert-butanesulfinyl imine