Process for the preparation of N-monosubstituted beta-amino alcohols
申请人:Michel Dominique
公开号:US20100240911A1
公开(公告)日:2010-09-23
A process for the preparation of a compound of formula:
and/or an addition salt of a proton acid, which process comprises the following steps:
(a) reacting a mixture comprising (i) a methyl ketone of formula IV and (ii) a compound of formula:
H
2
N—R
2
V
and/or an addition salt of proton acid, and
(iii) formaldehyde or a source of formaldehyde,
in the presence of a solvent, and optionally a proton acid,
to afford a β-amino ketone of formula II, and/or an addition salt of a proton acid,
and (b) reducing the carbonyl group of said β-amino acid,
the first step is carried out at a pressure above 1.5 bar.
Process for the preparation of N-monosubstituted β-amino alcohols
申请人:Michel Dominique
公开号:US08558014B2
公开(公告)日:2013-10-15
A process is disclosed for the preparation of a compound of formula
and/or an addition salt of a proton acid, wherein R1 and R2 independently represent alkyl, cycloalkyl, aryl or aralkyl, each aryl or aralkyl being optionally further substituted with alkyl, alkoxy and/or halogen. The process involves reacting a mixture comprising a methyl ketone of formula
and a compound of formula H2N—R2 (V) and/or an addition salt of proton acid, and formaldehyde in the presence of a solvent selected from the group consisting of water, aliphatic alcohols, cycloaliphatic alcohols and mixtures thereof, and optionally a proton acid to afford a β-amino ketone of formula
and/or an addition salt of a proton acid, and reducing the carbonyl group of said β-amino ketone to afford a compound of formula I, and/or an addition salt of a proton acid
wherein the first step is carried out at a pressure above 1.5 bar.
Process for the Preparation of N-Monosubstituted beta-Amino Alcohols
申请人:Lonza AG
公开号:US20150112086A1
公开(公告)日:2015-04-23
A process is disclosed for the preparation of a compound of formula
and/or an addition salt of a proton acid, wherein R
1
and R
2
independently represent alkyl, cycloalkyl, aryl or aralkyl, each aryl or aralkyl being optionally further substituted with alkyl, alkoxy and/or halogen.
PROCESS FOR THE PREPARATION OF N-MONOSUBSTITUTED beta-AMINO ALCOHOLS
申请人:Michel Dominique
公开号:US20110004007A1
公开(公告)日:2011-01-06
A process is disclosed for the preparation of a compound of formula
and/or an addition salt of a proton acid, wherein R
1
and R
2
independently represent alkyl, cycloalkyl, aryl or aralkyl, each aryl or aralkyl being optionally further substituted with alkyl, alkoxy and/or halogen. The process involves reacting a mixture comprising a methyl ketone of formula
and a compound of formula H
2
N—R
2
(V) and/or an addition salt of proton acid, and formaldehyde in the presence of a solvent selected from the group consisting of water, aliphatic alcohols, cycloaliphatic alcohols and mixtures thereof, and optionally a proton acid to afford a β-amino ketone of formula
and/or an addition salt of a proton acid, and reducing the carbonyl group of said β-amino ketone to afford a compound of formula I, and/or an addition salt of a proton acid
wherein the first step is carried out at a pressure above 1.5 bar.