63473-60-9Relevant articles and documents
ENZYMES IN ORGANIC SYNTHESIS. 42. INVESTIGATION OF THE EFFECTS OF THE ISOZYMAL COMPOSITION OF PIG LIVER ESTERASE ON ITS STEREOSELECTIVITY IN PREPARATIVE-SCALE ESTER HYDROLYSES OF ASYMMETRIC SYNTHETIC VALUE.
Lam,Brown,De Jeso,Lym,Toone,Jones
, p. 4409 - 4411 (1988)
The stereospecificities of the isozyme components of commercially available pig liver esterase have been shown to be essentially the same toward representative monocyclic and acyclic diester substrates. This removes previous concerns that the isozymal com
Cinchona alkaloid derivative modified Fe3O4nanoparticles for enantioselective ring opening of: Meso -cyclic anhydrides
Soni, Hemant P.,Tomer, Sanjiv O.
, p. 2495 - 2507 (2022/02/11)
In the present work, the molecular framework of quinidine was modified at the methoxy functional group of the C6′ carbon of the quinoline moiety with a long-chain carboxylic acid group (-COOH) and it was used as a capping agent during the synthesis of Fe3
Atropselective Synthesis of N,C-Bis(diphenylphosphanes) from Bridged 2-Arylindoles Based on Effective Point-to-Axial Asymmetric Inductions after an Unusual Dilithiation ⊥
B?uerle, Felix,Brückner, Reinhard
supporting information, p. 9970 - 9975 (2019/12/24)
An asymmetric methanolysis of glutaric anhydride and 6 ensuing steps gave veratrol-annulated dimethylcyclo-heptenone diastereomers with 99% ee; ring closures occurred by Friedel-Crafts acylations of carboxylic acids obtained by stereospecific hydrogenolyses of a pair of diastereomeric δ-lactones. The mentioned cycloheptenones and Ph-NH-NH2 underwent Fischer indole syntheses providing the tetracyclic indoles cis- and trans-14a, respectively. Double lithiations with BuLi and quenchings with ClPPh2 furnished the diphosphanes cis- and trans-15 with perfect (P)- and (M)-atropselectivity, respectively.
Enantioselective acyl-transfer catalysis by fluoride ions
Craig, Ryan,Litvajova, Mili,Cronin, Sarah A.,Connon, Stephen J.
supporting information, p. 10108 - 10111 (2018/09/18)
The asymmetric nucleophilic catalysis by fluoride ions at a carbon-based electrophile has been demonstrated for the first time. Using a library of ad hoc designed bifunctional phase-transfer catalysts in which both the anion and the cation are directly involved in the reaction, the desymmetrisation of meso-succinic and -glutaric anhydrides is possible.19F NMR spectroscopic studies support the intermediacy of an acyl fluoride intermediate.