Prodrug acid esters of [2-(4-benzyl-3-hydroxy-piperidin-1-yl)-ethansulfonyl]phenol
申请人:——
公开号:US20020040037A1
公开(公告)日:2002-04-04
The invention is a compound of the formula
1
wherein
R is
a) —C(O)(CH
2
)
n
C(O)OH,
b)
2
wherein R
1
is —N(R
2
)(R
3
), or is a five or six member aromatic or non-aromatic heterocyclic ring having one or more heteroatoms selected from nitrogen, oxygen or sulfur, unsubstituted or substituted by lower alkyl,
c) —P(O)(OH)
2
, or is
d) —C(O)(CH
2
)
n
NHC(O)(CH
2
)
n
N(R
2
)(R
3
); and
R
2
/R
3
are hydrogen or lower alkyl;
n is 1, 2, 3 or 4;
or a pharmaceutically acceptable acid addition salt thereof.
该发明是一种具有以下结构的化合物:
其中
R 是
a) —C(O)(CH2)nC(O)OH,
b) —N(R2)(R3),
或者是具有一个或多个来自氮、氧或硫的杂原子的五元或六元芳香或非芳香杂环,未取代或被低碳基取代,
c) —P(O)(OH)2,
或者是
d) —C(O)(CH2)nNHC(O)(CH2)nN(R2)(R3);
R2/R3 是氢或低碳基;
n 是 1、2、3 或 4;
或其药用可接受的酸盐。
Direct Asymmetric Intermolecular Aldol Reactions Catalyzed by Amino Acids and Small Peptides
alpha-amino acids, beta-amino acids, and chiral amines containing primary amine functions catalyze direct asymmetric intermolecular aldol reactions with high enantioselectivities. Moreover, the amino acids can be combined into highly modular natural and unusual small peptides that also catalyze direct asymmetric intermolecular aldol reactions with high stereoselectivities, to furnish the corresponding aldol
[EN] PROCESS FOR THE SYNTHESIS OF NA- BETA-ALANINATE AND CALCIUM PANTOTHENATE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE NA-BETA-ALANINATE
申请人:DSM IP ASSETS BV
公开号:WO2009016025A1
公开(公告)日:2009-02-05
In a process for the preparation of Na-β-alaninate from β-amino-propionitrile ready for the condensation with pantolactone to pantothenate the improvement of obtaining Na-β-alaninate as a solution in an alcohol, which improvement comprises carrying out the hydrolysis of β-amino-propionitrile in water and then making a solvent exchange from water to an alcohol, thus achieving that the final β-alaninate mixture contains side- or by-products in amounts only, which do not negatively influence the-pantothenate quality.
Kinetic Analysis of L-Carnosine Formation by β-Aminopeptidases
作者:Tobias Heck、Venkata S. Makam、Jochen Lutz、Lars M. Blank、Andreas Schmid、Dieter Seebach、Hans-Peter E. Kohler、Birgit Geueke
DOI:10.1002/adsc.200900697
日期:2010.2.15
investigated the kinetics of the enzyme-catalyzed peptidecouplings. DmpA catalyzed the formation of L-carnosine from C-terminally activated β-alanine derivatives (acyldonor) and L-histidine (acyl acceptor) in an aqueous reaction mixture at pH 10 with high catalytic rates (Vmax=19.2 μmol min−1 per mg of protein, kcat=12.9 s−1), whereas Vmax in the BapA-catalyzed coupling reaction remained below 1.4 μmol min−1
β,α-二肽L-肌肽高浓度存在于长寿的受神经支配的哺乳动物组织中,并作为食品添加剂被广泛出售。通过化学合成方法可大规模生产左旋肌肽。我们已经建立了两个水性酶促反应体系,用于使用人鞭毛支原体中溶解的细菌β-氨基肽酶DmpA和鞘翅目的鞘氨醇鞘氨醇的BapA作为催化剂制备L-肌肽,并研究了酶催化的肽偶联的动力学。DMPA催化L-肌肽的来自C末端活化的β丙氨酸衍生物在含水反应混合物中形成(酰基供体)和L-组氨酸(酰基受体)在pH 10下具有高催化速率(V最大= 19.2微摩尔分钟每mg蛋白质-1,k cat = 12.9 s -1),而BapA催化的偶联反应中的V max仍低于1.4μmolmin -1每mg蛋白质(k cat = 0.87 s -1)。尽管该反应的平衡位于水解产物的一边,但是该反应处于动力学控制下,L-肌肽暂时累积至对应于所用酰基供体的大于50%的产率的浓度。但是,竞争性亲核试剂
HIV integrase inhibitors
申请人:Bristol-Myers Squibb Company
公开号:US07109186B2
公开(公告)日:2006-09-19
The present invention describes novel compounds of Formula I which inhibit HIV integrase. The invention also describes compositions and treatments of AIDS or ARC by using these compounds