AbstractDurch katalytische Hydrierung bzw. NaBH4‐Reduktion von 2‐Isonitroso‐indanon (1a) werden beide stereoisomere Formen des 2‐Amino‐indanols (4a, 6a) erhalten. Das sterische Ergebnis der Hydrierung ist vom pH‐Wert der Lösung abhängig: Im sauren Milieu entsteht die cis‐Form, im neutralen oder alkalischen die trans‐Form. Ferner wurden methoxylierte 2‐Amino‐indanole dargestellt, von denen diejenigen mit einer Methoxygruppe in 5‐Stellung leicht unter Stickstoff‐Eliminierung in β‐Indanone übergehen.
A highly efficient enantio- and diastereoselective catalyzed asymmetrictransferhydrogenation via dynamic kinetic resolution (DKR–ATH) of α,β-dehydro-α-acetamido and α-acetamido benzocyclic ketones to ent-trans-β-amido alcohols is disclosed employing a new ansa-Ru(II) complex of an enantiomericallypure syn-N,N-ligand, i.e. ent-syn-ULTAM-(CH2)3Ph. DFT calculations of the transition state structures
Some 2-amino-6,7-dimethoxytetralins have been prepared for pharmacological test. Certain differences in reactivity of 2-amino-1-tetralol and 2-amino-1-indanol compared with the analogues containing methoxyl para to the benzylic group are noted.
series of novel atropisomeric diphosphine ligands termed TanPhos were designed and synthesized, which has a smaller bite angle compared with that of other ligands such as BINAP. TanPhos showed high reactivity and enantioselectivity in the rhodium-catalyzed asymmetrichydrogenation of a-dehydro amino ketones, and up 99% yield and 99% ee were obtained for a wide range of chiral α-amino ketones.