[EN] NOVEL SUBSTITUTED 1,2,4-TRIOXANES USEFUL AS ANTIMALARIAL AGENTS AND A PROCESS FOR THE PREPARATION THEREOF [FR] NOUVEAUX 1,2,4-TRIOXANES SUBSTITUES UTILISES COMME ANTIPALUDIQUES ET PROCEDE DE PREPARATION DE CES ANTIPALUDIQUES
The present invention relates to compounds of the general formula (I)
The compounds are useful in the treatment and/or prevention of conditions mediated by nuclear receptors, in particular the Peroxisome Proliferator-Activated Receptors (PPAR).
An asymmetric hydrogenation of β-branched enolesters has been developed for the first time, providing a new route for the synthesis of β-chiral primary alcohols. Using a (S)-SKP-Rh complex bearing a large bite angle and enolester substrates possessing an O-fomyl directing group, the desired products were obtained in quantitative yields and with excellent enantioselectivities.
The synthesis of non-racemic β-alkyl-β-aryl-disubstituted allyl alcohols and their transformation into allylamines and amino acids bearing a quaternary stereocenter
synthesis of non-racemic β-alkyl-β-aryl allyl alcohols and their transformation into allylamines bearing a quaternary stereogenic center is reported. The allyl alcohols were prepared either by Cu-catalyzed enantioselective reduction of enones or by sequential alkylation/hydrostannylation/Stille coupling of non-racemic propargyl alcohols. The prepared β-alkyl-β-aryl allyl alcohols were converted (after carbamoylation)
Substituted 1,2,4-trioxanes useful as antimalarial agents and a process for the preparation thereof
申请人:——
公开号:US20040053991A1
公开(公告)日:2004-03-18
In the present invention relates to a novel series of antimalarial 1,2,4-trioxanes analogues of general formula 7,
1
wherein R represents cycloalkyl groups selected from the groups consisting of cyclopentyl, cyclohexyl, cycloheptyl and cyclooctyl or aryl groups selected from phenyl, 4-bromophenyl and 4-chlorophenyl, R
1
and R
2
represent hydrogen, alkyl group selected from methyl, ethyl, propyl and decyl, aryl selected from phenyl or parts of a cyclic systems such as cyclopentane, cyclohexane, substituted cyclohexane, cycloheptane bicyclo(2.2.1)heptane, adamantane and its preparation thereof; several of these novel compounds show promising antimalarial activity against multidrug resistant malaria in mice.
Iminium Catalysis inside a Self-Assembled Supramolecular Capsule: Modulation of Enantiomeric Excess
作者:Thomas M. Bräuer、Qi Zhang、Konrad Tiefenbacher
DOI:10.1002/anie.201602382
日期:2016.6.27
The noncovalent combination of a supramolecular host with iminiumorganocatalysis is described. Due to cation–π interactions the reactiveiminium species is held inside the host and reacts in this confined environment. The products formed differ up to 92 % ee from the control experiments without added host. A model rationalizing the observed difference is presented.