Disulfonimide‐Catalyzed Asymmetric Reduction of
<i>N</i>
‐Alkyl Imines
作者:Vijay N. Wakchaure、Philip S. J. Kaib、Markus Leutzsch、Benjamin List
DOI:10.1002/anie.201504052
日期:2015.9.28
A chiral disulfonimide (DSI)‐catalyzedasymmetric reduction of N‐alkyl imines with Hantzsch esters as a hydrogen source in the presence of Boc2O has been developed. The reaction delivers Boc‐protectedN‐alkyl amines with excellent yields and enantioselectivity. The method tolerates a large variety of alkyl amines, thus illustrating potential for a general reductive cross‐coupling of ketones with diverse
Tackling
<i>N</i>
‐Alkyl Imines with 3d Metal Catalysis: Highly Enantioselective Iron‐Catalyzed Synthesis of α‐Chiral Amines
作者:Clemens K. Blasius、Niklas F. Heinrich、Vladislav Vasilenko、Lutz H. Gade
DOI:10.1002/anie.202006557
日期:2020.9.7
catalyzes the highly enantioselective hydroboration of N‐alkyl imines. Employing a chiral bis(oxazolinylmethylidene)isoindoline pincer ligand, the asymmetric reduction of various acyclic N‐alkyl imines provided the corresponding α‐chiral amines in excellent yields and with up to >99 % ee. The applicability of this base metal catalytic system was further demonstrated with the synthesis of the pharmaceuticals
Disclosed are compounds of Formula 1, including all geometric and stereoisomers, tautomers, N-oxides, and salts thereof,
wherein
R
1
, R
2
, R
3
, R
4
, R
5
, A, W, X, G, Z, J and n are as defined in the disclosure.
Also disclosed are compositions containing the compounds of Formula 1 and methods for controlling plant disease caused by a fungal pathogen comprising applying an effective amount of a compound or a composition of the invention.
Exploring New Uses for C−H Amination: Ni-Catalyzed Cross-Coupling of Cyclic Sulfamates
作者:Paul M. Wehn、J. Du Bois
DOI:10.1021/ol051896l
日期:2005.10.1
Benzene-fused cyclic sulfamates are prepared from ortho-substituted phenolic starting materials through selective C-H amination or olefin aziridination. These unique heterocycles will engage in Ni-catalyzed cross-coupling reactions with aryl- and alkyl-Grignard reagents. Application of modern tools for C-N and C-C bond formation thus makes readily available functional amine derivatives and augments the possible uses for C-H amination in synthesis.
SUBSTITUIERTE CYCLOHEXANDERIVATE UND IHRE VERWENDUNG IN ARZNEIMITTELN ZUR BEHANDLUNG VON KARDIOVASKULÄREN ERKRANKUNGEN