195131-54-5Relevant articles and documents
The regioisomeric triphenylaminoethanols - Comparison of their efficiency in enantioselective catalysis
Braun, Manfred,Fleischer, Ralf,Mai, Brigitte,Schneider, Marc-Andre,Lachenicht, Stefan
, p. 474 - 482 (2007/10/03)
Both enantiomers of the novel amino alcohol (R)- and (S)-2 are prepared from the corresponding enantiomer of the mandelic acid-derived ethanediol 3. The regioisomeric amino alcohols 1 and 2 are converted into the imines 7 and 8, respectively. Titanium com
Reactions of (R) and (S)-1,1,2-triphenyl-1,2-ethandiols induced by aminium salts and protic acids. Solvent effects
Lopez, Luigi,Farinola, Gianluca M.,Paradiso, Vincenza,Mele, Giuseppe,Nacci, Angelo
, p. 10817 - 10826 (2007/10/03)
(R) and (S) 1,1,2-triphenyl-1,2-ethandiols (1a) and (1b), upon treatment of their dichloromethane solutions with catalytic amounts of aminium salt cation radicals afforded mixtures of the corresponding pinacolones (Ph3CCHO, 90%) (2), Ph2CHCOPh, 10%) (3), whereas similar reactions, carried out in acetonitrile, led to consistent amounts of both pinacolones, together with benzophenone (4), benzaldehyde (5) (minor amounts), and new products (30%), fully characterized as (R) and (S) 4,4,5-triphenyl-2-methyloxazolines (7a,b). The formation of these latter was selectively inhibited in the aminium salt induced reactions, modified by 2,6-di-tert-butylpyridine (DBP).
