Quinaldoyl-amine derivatives of oxo-and hydroxy-substituted hydrocarbons
申请人:Narhex Limited
公开号:US05679688A1
公开(公告)日:1997-10-21
The present invention discloses the compounds of general formula (1) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 are optionally substituted carbonyl and amide derivatives which are useful as inhibitors of retroviral proteases, and are effective in treating conditions characterized by unwanted activity of these enzymes, such as acquired immune deficiency syndrome.
Studies of Bitter Peptides from Casein Hydrolyzate. VI. Syntheses and Bitter Taste of BPIc (Val–Tyr–Pro–Phe–Pro–Pro–Gly–Ile–Asn–His) and Its Analogs and Fragments
作者:Hidenori Kanehisa
DOI:10.1246/bcsj.57.97
日期:1984.1
In order to investigate the relationship between chemical structure and bitter taste, the bitter peptide BPIc (Val–Tyr–Pro–Phe–Pro–Pro–Gly–Ile–Asn–His) isolated from casein hydrolyzate by Minamiura et al. and its analogs and fragments were synthesized. BPIc, whose threshold value of bitter taste was 0.05 mM, was found to be one of the most bitter compounds, like quinine and phenylthiourea. However, [Gly5,6]- and [Gly9,10]-BPIc, and N-terminal octa- and heptapeptide fragments of BPIc possessed much weaker bitterness than BPIc. The results suggested that 5,6-proline and the basic nature of C-terminal are necessary for the strong bitterness exhibited by BPIc.
为了研究化学结构与苦味之间的关系,研究人员合成了 Minamiura 等人从酪蛋白水解物中分离出的苦味肽 BPIc(Val-Tyr-Pro-Phe-Pro-Gly-Ile-Asn-His)及其类似物和片段。研究发现,BPIc 的苦味阈值为 0.05 mM,与奎宁和苯硫脲一样是最苦的化合物之一。然而,[Gly5,6]- 和 [Gly9,10]-BPIc 以及 BPIc 的 N 端八肽和七肽片段的苦味比 BPIc 弱得多。结果表明,5,6-脯氨酸和 C 端的碱性是 BPIc 表现出强烈苦味的必要条件。
Peptides and processes for producing cyclic peptides
申请人:Daicel Chemical Industries
公开号:US05428129A1
公开(公告)日:1995-06-27
In this invention, a peptide of the following general formula is subjected to cyclization reaction to produce a cyclic peptide, preferably a synthetic calcitonin derivative (elcatonin) which is a useful medicine. ##STR1## (wherein A and B form a peptide of the formula Ser-Asn-Leu-Ser-Thr (SEQ ID NO: 47); X means a hydroxyl group, a carboxy-protecting group, an amino acid residue or a peptide residue; provided that the side-chain carboxyl group of .alpha.-L-aminosuberic acid is condensed with an amino acid or a peptide). The cyclic peptide can be obtained by subjecting a peptide of the above general formula to (1) cyclization reaction by chemical condensation, (2) cyclization reaction in the presence of an alkali metal salt and (3) reactions using the techniques of liquid phase synthesis and solid phase synthesis in combination.
在这项发明中,将以下一般式的肽经过环化反应产生一个环肽,优选为合成降钙素衍生物(elcatonin),该药物非常有用。##STR1## (其中A和B形成肽的式子为Ser-Asn-Leu-Ser-Thr(SEQ ID NO:47);X表示羟基,羧基保护基,氨基酸残基或肽残基;前提是α-L-氨基戊酸的侧链羧基与氨基酸或肽缩合)。通过化学缩合的环肽可以通过以下方法获得:(1)在碱金属盐的存在下进行环化反应,(2)使用液相合成和固相合成技术相结合的反应。
Methods for treating alzheimer's disease using quinaldoyl-amine derivatives of oxo-and hydroxy-substituted hydrocarbons
申请人:——
公开号:US20040266871A1
公开(公告)日:2004-12-30
Disclosed are methods for treating Alzheimer's disease, and other diseases, and/or inhibiting beta-secretase enzyme, inhibiting beta-secretase enzyme, and/or inhibiting deposition of A beta peptide in a mammal, by use of compounds of of compounds of formula (I) wherein R
1
, R
2
, R
3
. and N, are defined herein.
1
Combination of 2-substituted carbapenems with dipeptidase inhibitors
申请人:Merck & Co., Inc.
公开号:US05071843A1
公开(公告)日:1991-12-10
A combination of a carbapenem of the formula: ##STR1## where R is H or CH.sub.3 and R.sup.1 is ##STR2## with a renal dipeptidase inhibitor is disclosed.