Stereoespecific syntheses of (+/-)-trans-N,N-cyclohexane-1,2-diamines ((+/-)-4 a-g) were carried out from the corresponding (+/-)-trans-N,N-dialkylaminocyclohexanols by successive treatment with mesyl chloride and aqueous ammonia. The stereochemical outcome indicates the formation of a meso-aziridinium ion intermediate. Kinetic resolutions of diamines (+/-)-4 were efficiently accomplished in aminolysis
Synthesis of Amino-Functionalized Sulfonimidamides and Their Application in the Enantioselective Henry Reaction
作者:Marianne Steurer、Carsten Bolm
DOI:10.1021/jo100326x
日期:2010.5.21
Amino-functionalized sulfonimidamides have been prepared by aziridinium ring-Opening reactions and nucleophilic substitutions of sulfonimidoyl chlorides. Whereas the former reactions afford separable diastereomeric products, the latter provide single stereoisomers. Application of the resulting stereochemically homogeneous sulfonimidamides as ligands in asymmetric copper-catalyzed Henry reactions of aromatic aldehydes with nitromethane led to products with enantioselectivities up to 95% ee in good yields.
[EN] AMINOCYCLOALKYL CINNAMIDE COMPOUNDS FOR ARRHYTHMIA AND AS ANALGESICS AND ANESTHETICS<br/>[FR] COMPOSES D'AMINOCYCLOAKYL-CINNAMIDE DESTINES A L'ARYTHMIE ET UTILES EN TANT QU'ANALGESIQUES ET ANESTHESIANTS
申请人:NORTRAN PHARMACEUTICALS INC
公开号:WO2000051981A1
公开(公告)日:2000-09-08
Aminocycloalkyl cinnamide compounds (I) are disclosed. The compounds of the present invention may be incorporated in compositions and kits. The present invention also discloses a variety of in vitro and in vivo uses for the compounds and compositions, including the treatment of arrhythmia and the production of local analgesia and anesthesia. n=1-4; R1, R2, R3, R4, R5, R13, X and A are as in claim (1).
Squaramide-Linked Chloramphenicol Base Hybrid Catalysts for the Asymmetric Michael Addition of 2,3-Dihydrobenzofuran-2-carboxylates to Nitroolefins
of hybrid catalysts incorporating chloramphenicol base with another chiral scaffold using a squaramide linker have been developed and successfully applied in Michael addition of 2,3-dihydrobenzofuran-2-carboxylates to nitroolefins. The controlling experiments suggested that the hybrid catalysts were more reactive than non-hybridized bifunctional catalysts and the matching of chiralities between two