[EN] NOVEL BENZYL SULFONAMIDE COMPOUNDS USEFUL AS MOGAT-2 INHIBITORS [FR] NOUVEAUX COMPOSÉS DE BENZYLSULFONAMIDE UTILES EN TANT QU'INHIBITEURS DE MOGAT-2
Unprecedented Catalytic Asymmetric Reduction of N−H Imines
摘要:
Addition of lithium bis(trimethylsilyl)amide to perfluorinated ketones 1a-j affords (E)-N-TMS-ketimines 2a-j that are reduced in situ to afford racemic perfluoromethylated amine hydrochloride salts 3a-j in 54-97% yields. Solvolysis of the N-Si bond in MeOH leads to formation of bench-stable, isolable N-H imine Z/E isomer mixtures along with a methanol adduct. Enantioselective reduction of these three-component mixtures provides the first catalytic asymmetric synthesis of trifluoromethylated amines in 72-95% yields and 75-98% ee.
This invention relates to substituted bis-amide pyrimidine compounds of Formula (I), which are useful for the treatment of metalloprotease mediated diseases, in particular MMP-13 related diseases.
One-pot asymmetric synthesis of α-trifluoromethylated amines from α-trifluoromethyl ketones
作者:Jian Xu、Zhen-Jiang Liu、Xian-Jin Yang、Li-Min Wang、Guan-Long Chen、Jin-Tao Liu
DOI:10.1016/j.tet.2010.09.047
日期:2010.11
of (Rs)-N-tert-butanesulfinyl α-trifluoromethyl ketimines formed in situ from the corresponding α-trifluoromethyl ketones and N-tert-butanesulfinamide has been achieved, and either diastereomer of N-tert-butanesulfinyl α-trifluoromethyl amines was obtained in good yields with excellent diastereoselectivities (up to 99:1 dr) using NaBH4 and L-Selectride as the reductants, respectively.
This invention describes the reaction of an alpha fluoroalkyl ketone with a bis(trialkylsilyl)amide to give a stable N-trialkylsilyl imine. Treatment of the N-trialkylsilyl imine with an alcohol leads to solvolysis of the trialkylsilyl group and yields a stable mixture of an aminal and an imine in high yield. Catalytic reduction of this mixture, or of the individual components, in the presence of a chiral catalyst leads to a fluoroalkyl amine with high enantioselectivity and high yield.
Reversible Inhibitors of Monoamine Oxidase A and B
申请人:Oballa Renata
公开号:US20090291988A1
公开(公告)日:2009-11-26
The instant invention relates to compounds of formula I, diagrammed below, wherein R3, E, D and Y are defined in the application, which are useful as reversible inhibitors of monoamine oxidase-B and/or monoamine oxidase-A, and therefore useful to treat or prevent neurological diseases or conditions in mammals, preferably humans.
A very general reaction is presented to achieve the nucleophilic transfer of "CF3 " to chiral N-(tert-butylsulfinyl)imines in high yield and high stereoselectivity. Tetrabutylammonium difluorotriphenylsilicate (TBAT) functions as a fluoride source, and aromatic, heterocyclic, and aliphatic sulfinylimines react smoothly. The high stereoselectivity suggests that the reaction proceeds through an open