An asymmetric Strecker-type reaction of nitrones using acetone cyanohydrin as a source of HCN has been realized. A magnesium–tartramide complex, generated from (R,R)-2,3-dihydroxy-1,4-di(pyrrolidin-1-yl)-butane-1,4-dione and MeMgBr, promoted transcyanation from the bromomagnesiumsalt of the cyanohydrin, in the presence of a catalytic amount of DBU, to afford the corresponding optically active (S)-α-amino
NOVEL INDOLIC DERIVATIVES, THEIR PREPARATION PROCESSES AND THEIR USES IN PARTICULAR AS ANTIBACTERIALS
申请人:Denis Jean-Noel Marie Leon
公开号:US20100144726A1
公开(公告)日:2010-06-10
The invention relates to the use of at least one compound of the formula (I),
in which R and R
3
are particularly a hydrogen atom, R
1
is particularly a hydrogen atom or a methyl, ethyl or isobutyl mi group, R
4
, R
5
, R
6
and R
7
are independently a hydrogen atony, an alkoxyl group with 1 to 7 carbon atoms or a halogen atom, R
2
is a hydrogen atom, an O
−
group or an OH group, B is an N-GP
1
or NR
c
, group, GP
1
being a Boc or Cbz group, and R
c
is a hydrogen atom or a methyl or t-butyl group, for preparing a drug for treating conditions associated with bacterial infections, in particular for treating bacterial diseases.
[EN] BIS-INDOLIC DERIVATIVES, THEIR USES IN PARTICULAR AS ANTIBACTERIALS<br/>[FR] DÉRIVÉS BIS-INDOLIQUES, LEURS UTILISATIONS EN PARTICULIER EN TANT QU'ANTIBACTÉRIENS
申请人:UNIV JOSEPH FOURIER
公开号:WO2013014104A1
公开(公告)日:2013-01-31
The present invention relates to novel bis-indolic derivatives, processes for their preparation, and their potential use as new antibacterial drugs.
Mannich‐type Reactions of Cyclic Nitrones: Effective Methods for the Enantioselective Synthesis of Piperidine‐containing Alkaloids
作者:Vladislav G. Lisnyak、Tessa Lynch‐Colameta、Scott A. Snyder
DOI:10.1002/anie.201809799
日期:2018.11.12
dozens of biologically active 2-substituted and 2,6-disubstituted piperidines, only a limited number of approaches exist for their synthesis. Herein is described two Mannich-type additions to nitrones, one using β-ketoacids under catalyst-free conditions and another using methyl ketones in the presence of chiral thioureas, which can generate a broad array of such 2-substituted materials, as well as other
Cyclohexanone monooxygenase from Acinetobacter calcoaceticus catalyzed the oxidation of tertiary and secondary amines to N-oxides and nitrones, respectively. The formation of a hydroxylamine intermediate was involved with secondary amines as starting substrates.