Synthesis of highly enantiomerically enriched amines by the diastereoselective addition of triorganozincates to N-(tert-butanesulfinyl)imines
作者:Raquel Almansa、David Guijarro、Miguel Yus
DOI:10.1016/j.tetasy.2008.10.012
日期:2008.11
different from the ones observed with the corresponding Grignardreagents, which allows, in several cases, the preparation of both enantiomers of an amine from the same imine substrate. When mixed triorganozincates are used, one can take advantage of the slow transfer rate of the methyl group to use it as a non-transferable one. Both aromatic and aliphatic aldimines, as well as activated ketimines, are good
Enantioenriched BCP Benzylamine Synthesis via Metal Hydride Hydrogen Atom Transfer/Sulfinimine Addition to [1.1.1]Propellane
作者:Russell Shelp、Rohan R. Merchant、Jonathan M. E. Hughes、Patrick J. Walsh
DOI:10.1021/acs.orglett.1c03681
日期:2022.1.14
The stereoselective synthesis of bicyclo[1.1.1]pentane (BCP) benzylamine derivatives from [1.1.1]propellane and mesityl sulfinimines via metal hydride hydrogen atom transfer (MH HAT) is reported. Medicinally relevant heterocyclic BCP methanamines are prepared with high diastereoselectivity. The strategic impact of the method is demonstrated via the streamlined synthesis of the BCP analogue of a key
Asymmetric synthesis of 1-substituted 2,6-diazaspiro[3.3]heptane is described. This methodology affords excellent yields (up to 89%) and high diastereomeric ratios (dr up to 98:2) and delivers differentially protected amines within the products.
Double Asymmetric Induction in the Synthesis of Enantiomeric α-Aminophosphonic Acids Mediated by Sulfinimines
作者:Piotr Łyżwa
DOI:10.1002/hc.21130
日期:2014.1
A double asymmetric induction in the synthesis of α-aminophosphonicacids is described. It involves the nucleophilic addition of anions of enantiomeric dimenthyl phosphites to both (+)-(S)- and (–)-(R)-enantiomers of N-(p-tolylsulfinyl)benzaldimine and subsequent acidic hydrolysis of the adducts formed. The match and mismatch effects were observed.
Asymmetric synthesis of diverse α,α-diarylmethylamines via aryl Grignard additions to chiral N-2,4,6-triisopropylbenzenesulfinylimines
作者:Zhengxu Han、Robert Busch、Keith R. Fandrick、Angelica Meyer、Yibo Xu、Dhileep K. Krishnamurthy、Chris H. Senanayake
DOI:10.1016/j.tet.2011.07.019
日期:2011.9
A mild method has been developed for the asymmetricsynthesis of a variety of chiral diarylmethylamines via the addition of arylGrignardreagents to chiral N-2,4,6-triisopropylbenzenesulfinylimines in high yields and high diastereoselectivities. Higher stereoselectivity was obtained for most of the examples studied when the reactions are performed at ambient temperature as compared to cryogenic conditions