A composition prepared by containing or blending a physiologically active non-peptide substance and a biodegradable polymer having two or more carboxylic groups at its end or a salt thereof features: (1) larger content of the physiologically active non-peptide substance can be contained, as well as release of the same can be controlled or accelerated, whereby secure pharmaceutical effect is achieved; (2) when the physiologically active non-peptide substance causes subcutaneous stimulation, an activity of canceling the stimulation by strongly acidic group at its end is expected; and (3) high glass transition point and high stability.
Cerium(IV) mediated oxygenation of dialkyl malonates: A novel synthesis of tartronic acid derivatives
作者:Vijay Nair、Latha G. Nair、Jessy Mathew
DOI:10.1016/s0040-4039(98)00250-0
日期:1998.4
A novel Cerium(IV) mediated oxygenation of dialkyl malonates leading to a direct synthesis of tartronic acid derivatives is described.
描述了一种新的铈(IV)介导的丙二酸二烷基酯的氧合,可直接合成tartronic酸衍生物。
Sustained release compositions
申请人:——
公开号:US20040023987A1
公开(公告)日:2004-02-05
A composition prepared by containing or blending a physiologically active non-peptide substance and a biodegradable polymer having two or more carboxylic groups at its end or a salt thereof features: (1) larger content of the physiologically active non-peptide substance can be contained, as well as release of the same can be controlled or accelerated, whereby secure pharmaceutical effect is achieved; (2) when the physiologically active non-peptide substance causes subcutaneous stimulation, an activity of canceling the stimulation by strongly acidic group at its end is expected; and (3) high glass transition point and high stability.
HYDROXYLATION OF BETA-DICARBONYLS WITH ZIRCONIUM CATALYSTS
申请人:CASALNUOVO ALBERT LOREN
公开号:US20080306259A1
公开(公告)日:2008-12-11
The present invention pertains to a process for preparing a compound of Formula I that is achiral, racemic or enantiomerically enriched at the hydroxylation center indicated by *
comprising contacting a compound of Formula II
with an oxidant selected from oxygen, hydrogen peroxide, peracids or alkyl hydropetoxides in the presence of a zirconium complex, wherein R
1
, R
2
and R
3
are as defined in the disclosure. This invention also pertains to zirconium complexes useful in this procedure comprising zirconium and a ligand of Formula III or its enantiomer
wherein J, R
6
and n are as defined in the disclosure. This invention further pertains to a compound of Formula III or its enantiomer.
Hydroxylation of Beta-Dicarbonyls with Zirconium Catalysts
申请人:Casalnuovo Albert Loren
公开号:US20100185014A1
公开(公告)日:2010-07-22
The present invention pertains to a process for preparing a compound of Formula I that is achiral, racemic or enantiomerically enriched at the hydroxylation center indicated by *
comprising contacting a compound of Formula II
with an oxidant selected from oxygen, hydrogen peroxide, peracids or alkyl hydroperoxides in the presence of a zirconium complex, wherein R
1
, R
2
and R
3
are as defined in the disclosure. This invention also pertains to zirconium complexes useful in this procedure comprising zirconium and a ligand of Formula III or its enantiomer
wherein J, R
6
and n are as defined in the disclosure. This invention further pertains to a compound of Formula III or its enantiomer.