The synthesis of chiral tridentate ligands from l -proline and their application in the copper(II)-catalyzed enantioselective Henry reaction
摘要:
A series of chiral tridentate ligands derived from readily available enantiopure L-proline were designed and synthesized. The ligands together with Cu(OAc)(2) were successfully used in asymmetric Henry reactions. Various structurally divergent aldehydes and nitromethane were converted into versatile beta-nitro alcohols in MeOH at room temperature with very good yields (up to 85%) and enantioselectivities (up to 86%). (C) 2017 Elsevier Ltd. All rights reserved.
Bicyclic heterocycles, the preparation thereof, and their use as
申请人:Boehringer Ingelheim Pharma KG
公开号:US06114532A1
公开(公告)日:2000-09-05
The present invention relates to 5-membered heterocyclic condensed benzoderivatives of formula ##STR1## wherein R.sub.a to R.sub.c, A, X and Y are defined as in claim 1, the tautomers, stereoisomers, mixtures thereof and the salts thereof, particularly the physiologically acceptable salts thereof with inorganic or organic acids or bases which have valuable properties. The compounds of the above formula I wherein R.sub.c denotes a cyano group are valuable intermediates for preparing the other compounds of formula I, and the compounds of the above formula I wherein R.sub.c denotes one of the following amidino groups and the tautomers and stereoisomers thereof have valuable pharmacological properties, particularly an antithrombotic activity.
Quinoxazolines having antithrombotic activity. Exemplary of those disclosed are:
4-{[6-(N-carboxymethyl-quinolin-8-yl-sulphonylamino)-1-methyl-2-oxo-1,2-dihydroquinoxalin-3-yl]-methyl}-benzamidine,
4-{[6-(1-(N-cyclopentyl-carboxymethylcarbonylamino)-cyclo-propyl)-1-methyl-2-oxo-1,2-dihydroquinoxalin-3-yl]-methyl}-benzamidine, and
4-{[7-(N-carboxymethylaminocarbonyl-ethylamino)-4-methyl-quinolin-2-yl]-oxo}-benzamidine.
[EN] 2,2'-BIBENZO[D]IMIDAZOLIDENE COMPOUND HAVING HETEROMONOCYCLIC GROUPS AT THE 1-, 1'-, 3- AND 3'-POSITIONS, AND ORGANIC LIGHT-EMITTING ELEMENT AND DISPLAY DEVICE CONTAINING THE SAME<br/>[FR] COMPOSÉ DE 2,2'-BIBENZO[D]IMIDAZOLIDÈNE AYANT DES GROUPES HÉTÉROMONOCYCLIQUES AU NIVEAU DES POSITIONS 1, 1', 3 ET 3', ET ÉLÉMENT ÉLECTROLUMINESCENT ORGANIQUE ET DISPOSITIF D'AFFICHAGE LE CONTENANT
申请人:CANON KK
公开号:WO2016174813A1
公开(公告)日:2016-11-03
The present invention provides a 2,2'-bibenzo[d]imidazolidene compound expressed by the following general formula (1). In general formula (1), Ar1 to Ar4 each represent a substituted or unsubstituted heteromonocyclic group. R1 to R8 each represent a hydrogen atom or a substituent.
A method for producing a biaryl compound, comprising reacting an aromatic organic compound with at least one compound selected from the group consisting of aromatic organoboron compounds and boroxine compounds, in the presence of a zero-valent nickel catalyst, phosphine ligand and base.
A method for producing a biaryl compound, comprising reacting an aromatic organic compound with at least one compound selected from the group consisting of aromatic organoboron compounds and boroxine compounds, in the presence of a zero-valent nickel catalyst, phosphine ligand and base.