Chemistry of <i>N</i>-Boc-<i>N-tert</i>-butylthiomethyl-Protected α-Aminoorganostannanes: Diastereoselective Synthesis of Primary β-Amino Alcohols from α-Aminoorganostannanes
作者:Adela Ncube、Sheldon B. Park、J. Michael Chong
DOI:10.1021/jo0161734
日期:2002.5.1
corresponding alpha-aminoorganolithiums. Reactions of these organolithiums with aromaticaldehydes provides N-protected beta-amino alcohols with diastereoselectivities up to >99:1 anti/syn; with aliphaticaldehydes, diastereoselectivities were typically 1:1. Diastereoselectivities varied depending on the amount of aldehyde used. The N-protected beta-amino alcohols could be deprotected to primary amines
Process for producing optically active beta-amino alcohol
申请人:Nishiyama Akira
公开号:US20050277791A1
公开(公告)日:2005-12-15
A process for easily producing an optically active β-amino alcohol useful as a pharmaceutical intermediate from an inexpensive, readily available starting material is provided. A readily available α-substituted ketone is reacted with an optically active amine to yield a diastereomer mixture of an optically active α-substituted aminoketone. One of the diastereomers is isolated optionally after the diastereomers are converted to salts with an acid. The optically active α-substituted aminoketone or a salt thereof thus isolated was stereoselectively reduced to yield an optically active β-substituted amino alcohol. The optically active β-substituted amino alcohol is subjected to hydrogenolysis to produce an optically active β-amino alcohol or a salt thereof.
Compounds of formula (I):
The present invention relates to novel indazolyl ester or amide derivatives, to pharmaceutical compositions comprising such derivatives, to processes for preparing such novel derivatives and to the use of such derivatives as medicaments
Compounds of formula (I):
The present invention relates to novel indazolyl ester or amide derivatives, to pharmaceutical compositions comprising such derivatives, to processes for preparing such novel derivatives and to the use of such derivatives as medicaments
PROCESS FOR PRODUCING OPTICALLY ACTIVE s-AMINO ALCOHOL
申请人:KANEKA CORPORATION
公开号:EP1512677A1
公开(公告)日:2005-03-09
A process for easily producing an optically active β-amino alcohol useful as a pharmaceutical intermediate from an inexpensive, readily available starting material is provided. A readily available α-substituted ketone is reacted with an optically active amine to yield a diastereomer mixture of an optically active α-substituted aminoketone. One of the diastereomers is isolated optionally after the diastereomers are converted to salts with an acid. The optically active α-substituted aminoketone or a salt thereof thus isolated was stereoselectively reduced to yield an optically active β-substituted amino alcohol. The optically active β-substituted amino alcohol is subjected to hydrogenolysis to produce an optically active β-amino alcohol or a salt thereof.