PROCESS FOR THE PREPARATION OF OPTICALLY ACTIVE 2-AMINO-1-PHENYLETHANOLS
Optically active 2-amino-l-phenylethanols of formula (I) or its mirror image, wherein R1 is hydrogen, C1-6alkyl or aryl-substituted C1-6alkyl and R2 through R6 are independently hydrogen, hydroxy or C1-6alkoxy, or salts thereof are prepared by asymmetric hydrogenation of the corresponding 2-aminoacetophenones in the presence of a ruthenium complex catalyst comprising a chiral phosphine ligand.
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Page/Page column 9-10
(2008/12/06)
PROCESS FOR THE PREPARATION OF OPTICALLY ACTIVE 2-AMINO-1-PHENYLETHANOLS
Optically active 2-amino-l-phenylethanols of formula (I) or its mirror image, wherein R1 is C1-6 alkyl or aryl-substituted C1-6 alkyl and R2 through R6 are independently hydrogen, hydroxy or C1-6 alkoxy, or salts thereof are prepared by asymmetric hydrogenation of the corresponding 2-aminoaceto-phenones in the presence of a rhodium complex catalyst comprising a chiral diphosphine ligand, wherein each phosphorus atom is part of a heterocyclic ring system which contains at least one chiral carbon atom directly bound to the phosphorus atom.
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Page/Page column 11-12
(2008/12/08)
SYNTHESIS AND RADIOPROTECTIVE ACTIVITY OF 2-PHENYLETHYLAMINE DERIVATIVES
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Alpatova, T. V.,Kovtun, V. Yu.,Olovyanishnikova, Z. A.,Klimova, A. D.,Kulinskii, V. N.,Yashunskii, V. G.
p. 857 - 863
(2007/10/02)
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