Production of chirally pure alpha-amino acids and N-sulfonyl alpha-amino acids
申请人:——
公开号:US20030013892A1
公开(公告)日:2003-01-16
Methods for production of chirally pure &agr;-amino acids and N-sulfonyl &agr;-amino acids are described. An aldehyde and a cyanide salt are reacted with an &agr;-methylbenzylamine to afford product. The product reacts with a strong acid, neutralized, and extracted. The resulting product is hydrolyzed to provide a product which is dissolved in a strong acid to provide a salt of a chirally pure &agr;-amino acid, which is reacted to provide the chirally pure a-amino acid. Another method involves mixing ephedrine hemihydrate and an N-sulfonyl &agr;-ethylnorvaline in ethanol at a molar ratio of 1:1; heating the mixture to dissolve the solids; cooling to allow formation of a precipitate; washing with an organic solvent to give diastereomeric salt; recrystallizing the salt; dissolving the recrystallized salt in an organic solvent and strong aqueous acid, separating the layers; washing the organic extract; drying and concentrating to provide chirally pure N-sulfonyl a-amino acid.
HETEROCYCLIC SULFONAMIDE INHIBITORS OF BETA AMYLOID PRODUCTION
申请人:Kreft Anthony F.
公开号:US20100022594A1
公开(公告)日:2010-01-28
Compounds of Formula (I),
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, T, W, X, Y and Z are as defined herein are provided, together with pharmaceutically acceptable salt, hydrates and/or prodrugs thereof. Methods of using these compounds for inhibiting beta amyloid production and for treatment of Alzheimer's disease and Down's syndrome are described.
Heterocyclic sulfonamide inhibitors of β amyloid production
申请人:Wyeth
公开号:US07691884B2
公开(公告)日:2010-04-06
Compounds of Formula (I),
wherein R1, R2, R3, R4, R5, R6, T, W, X, Y and Z are as defined herein are provided, together with pharmaceutically acceptable salt, hydrates and/or prodrugs thereof. Methods of using these compounds for determining β-amyloid levels in a subject are described.
Heterocyclic Sulfonamide Inhibitors of Beta Amyloid Production
申请人:Kreft Anthony F.
公开号:US20110034513A1
公开(公告)日:2011-02-10
Compounds of Formula (I),
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, T, W, X, Y and Z are as defined herein are provided, together with pharmaceutically acceptable salt, hydrates and/or prodrugs thereof. Methods of using these compounds for inhibiting beta amyloid production and for treatment of Alzheimer's disease and Down's syndrome are described.