A General Method for the Preparation of <i>N</i>-Sulfonyl Aldimines and Ketimines
作者:José Luis García Ruano、José Alemán、M. Belén Cid、Alejandro Parra
DOI:10.1021/ol048005e
日期:2005.1.1
[Reaction: see text] A simple procedure to obtain N-sulfonylimines involving the condensation of carbonyl compounds with p-tolyl or tert-butyl sulfinamides followed by oxidation with m-CPBA of the resulting N-sulfinylimines is reported. The method is applicable to aldehydes (aliphatics and aromatics) and ketones (diaryl, dialkyl, and aryl alkyl), even those containing enolizable protons. It also does
Metal-free catalytic reduction of aldehydes, ketones, aldimines, and ketimines
作者:Hiroaki Matsuoka、Kazuhiro Kondo
DOI:10.1016/j.cclet.2010.05.029
日期:2010.11
The metal-free combination of catalytic amounts of PPh3, B(C6F5)3, and PhSiH3 can efficiently hydrosilylate aldehydes, ketones, aldimines and ketimines to afford the corresponding reduction products in good yields.
催化量的PPh 3,B(C 6 F 5)3和PhSiH 3的无金属组合可以有效地使醛,酮,醛亚胺和酮亚胺氢化硅烷化,以高收率提供相应的还原产物。
Direct Synthesis of Enolizable<i>N</i>-Sulfonyl Ketimines Under Microwave Irradiation
作者:Pablo Ortiz、Juan F. Collados、Syuzanna R. Harutyunyan
DOI:10.1002/ejoc.201600022
日期:2016.3
through direct condensation between the parent aldehyde and the sulfonamide. However, this approach is not efficient for the synthesis of enolizable N-sulfonyl ketimines. Herein we report a rapid and facile methodology for obtaining these products using microwaveirradiation.
Chiral Bifunctional Phosphine Ligand Enables Gold-Catalyzed Asymmetric Isomerization and Cyclization of Propargyl Sulfonamide into Chiral 3-Pyrroline
作者:Xinpeng Cheng、Liming Zhang
DOI:10.1021/acs.orglett.1c02896
日期:2021.11.5
This work details an asymmetric gold-ligand cooperativecatalysis that transforms readily accessible chiral/achiral propargylic sulfonamides into chiral 3-pyrrolines. A bifunctional biphenyl-2-ylphosphine ligand featuring a chiral tetrahydroisoquinoline fragment is essential for the observed metal–ligand cooperation and the asymmetric induction. 2,5-cis-3-Pyrrolines are formed with excellent diastereoselectivities
Specifically, the uncatalyzed imination of thiols or sulfinates proceeds with good yields, while under the mild reaction conditions offered by visiblelightphotoredoxcatalysis, the radical amination of hydrazones or the sulfoximidation of benzylic, allylic and propargylic C–H bonds takes place satisfactorily.