32151-02-3Relevant articles and documents
Cyclic trans-β-amino alcohols: Preparation and enzymatic kinetic resolution
Rouf, Abdul,Gupta, Pankaj,Aga, Mushtaq A.,Kumar, Brijesh,Parshad, Rajinder,Taneja, Subhash C.
, p. 2134 - 2143 (2012/05/04)
Enantioenriched cyclic β-amino alcohols, trans-2-aminocyclohexanols (ee, >99%), trans-2-aminocyclopentanols (ee, >99%), trans-1-amino-2- indanols (ee, >99%) and trans-2-amino-1-indanols (ee, ~98%) were prepared in high yields via an Arthrobacter sp. Lipase/PLAP catalyzed kinetic resolution of racemic phthalimido acetates. The addition of toluene as a co-solvent dramatically improved the hydrolysis and enantioselectivity, whereas for indanols, substrate immobilization on Celite improved the efficacy of the kinetic resolution.
Stereoselective synthesis of 1,2-amino alcohols by asymmetric borane reduction of α-oxoketoxime ethers
Masui, Moriyasu,Shioiri, Takayuki
, p. 5195 - 5198 (2007/10/03)
Asymmetric reduction of α-oxoketoxime ethers with the reagents prepared in situ from trimethyl borate and chiral amino alcohols derived from either L-proline or α-pinene was investigated. Both cyclic and acyclic α- oxoketoxime ethers were reduced to afford the corresponding chiral 1,2amino alcohols with high enantioselectivities.
Enzymatic hydroxylation by dopamine β-hydroxylase
Mitrochkine, Anton A.,Eydoux, Frank,Gil, Gerard,Reglier, Marius
, p. 1171 - 1176 (2007/10/03)
The three-dimensional aspects of the chemistry of dopamine β-hydroxylase (DBH) was studied through a conformationally-restricted substrate analog approach. We found that the DBH-catalyzed hydroxylation of 2-aminoindane (1) exclusively produced the trans-(1S,2S)-2-amino-1-indanol (4S) (93% ee) in contrast to the stereochemical course of the pro-R hydroxylation of the DBH/phenethylamine reaction. Studies with stereospecifically deuterium labeled 2-aminoindanes 2 and 3 show that the production of (1S)-aminoindanol 4S is the result of stereospecific pro-S hydrogen abstraction followed by the oxygen binding with overall retention of configuration. On the basis of these findings, we propose a model for the interaction of the phenethylamine substrates with the enzyme.
Synthesis of Enantiomerically Pure cis and trans-2-Amino-1-indanol
Mitrochkine, Anton,Gil, Gerard,Reglier, Marius
, p. 1535 - 1538 (2007/10/02)
Enantiomerically pure cis and trans-2-amino-1-indanols 1 and 2 were synthesized via a highly enetioslective lipase catalyzed transestrification of racemic cis-2-azido-1-indanol 3.
COPPER(II) IN ORGANIC SYNTHESIS. X. THE IMPORTANCE OF STERIC HINDRANCE IN THE DESIGN OF CHIRAL TRIDENTATE LIGAND COPPER(II) CATALYSTS FOR ENANTIOSELECTIVE MICHAEL REACTIONS
Desimoni, Giovanni,Faita, Giuseppe,Mellerio, Giorgio,Righetti, Pier Paolo,Zanelli, Claudio
, p. 269 - 273 (2007/10/02)
Several copper(II) complexes with tridentate chiral ligands derived from 2-substituted 2-aminoethanols have been tested as catalysts for enantioselective Michael reactions.The degree of enantioselection increases with the increase of the steric hindrance of the substituents and the best result (65percent e.e.) was obtained with the benzyl-substituted catalyst.A comparison of these results with those obtained with complexes derived from 2-amino-1-indanols gives useful information about the requirements for the optimization of the catalyst design.