Stabilized Analogs of Thymopentin. 1. 4,5-Ketomethylene Pseudopeptides
摘要:
The pentapeptide, thymopentin (Arg(1)-Lys(2)-Asp(3)-Val(4)-Tyr(5)) is known for its activity as an immunomodulating drug, but with limited half-life in plasma. In this first paper of a series of three studies, the synthesis of analogs stabilized at the peptide bond between the C-terminal amino acids via insertion of a ketomethylene moiety is described. N-Blocked pseudopeptides containing Val(k)Phe, Ala(k)Phe, and Val(k)Val units were prepared and attached to chloromethyl Merrifield resin via the carboxy terminal. Removal of the N-BOC group by trifluoroacetic acid was followed by sequential coupling with N-BOC dipeptides of aspartic acid to yield resin-bound N-BOC pseudotetrapeptides. Removal of N-BOC and coupling with N-BOC-r-N-tosylarginine followed by total cleavage of blocking groups and resin by HF afforded the target pseudopentapeptides. The analogs were found to compete favorably with thymopentin for binding to CEM cells, but binding was reduced by about 20-30% on average. All analogs showed significant enhancement of half-life versus thymopentin in mouse serum, but most showed only modest improvement in human serum. Insertion of proline or norleucine at position 2 in the chain caused a substantial increase in half-life (3-4-fold), while N-methylnorleucine conferred complete stability in the analogs.
NOVEL SUBSTITUTED OCTAHYDROCYCLOPENTA[C]PYRROL-4-AMINES AS CALCIUM CHANNEL BLOCKERS
申请人:Stewart Andrew O.
公开号:US20100130558A1
公开(公告)日:2010-05-27
The present application relates to calcium channel inhibitors containing compounds of formula (I)
wherein L
1
, L
2
, R
1
, R
2
, and R
3
are as defined in the specification. The present application also relates to compositions comprising such compounds, and methods of treating conditions and disorders using such compounds and compositions.
[EN] REDOX DEHYDRATION COUPLING CATALYSTS AND METHODS RELATED THERETO<br/>[FR] CATALYSEURS DE COUPLAGE DE DÉSHYDRATATION RÉDOX ET PROCÉDÉS ASSOCIÉS À CEUX-CI
申请人:UNIV EMORY
公开号:WO2017070157A1
公开(公告)日:2017-04-27
This disclosure relates to synthetic coupling methods using catalytic molecules. In certain embodiments, the catalytic molecules comprise heterocyclic thiolamide, S-acylthiosalicylamide, disulfide, selenium containing heterocycle, diselenide compound, ditelluride compound or tellurium containing heterocycle. Catalytic molecules disclosed herein are useful as catalysts in the transformation of hydroxy group containing compounds to amides, esters, ketones, and other carbon to heteroatom or carbon to carbon transformations.
Polypeptides and derivatives thereof containing nor-statine and nor-cyclostatine are useful for inhibiting the angiotensinogen-cleaving action of the enzyme renin.
多肽及其衍生物中含有诺斯他汀和诺环斯他汀,对抑制酶肾素的血管紧张素原裂解作用是有用的。
Synthesis and SAR of 4-aminocyclopentapyrrolidines as orally active N-type calcium channel inhibitors for inflammatory and neuropathic pain
作者:Xenia Beebe、Clinton M. Yeung、Daria Darczak、Shashank Shekhar、Timothy A. Vortherms、Loan Miller、Ivan Milicic、Andrew M. Swensen、Chang Z. Zhu、Patricia Banfor、Jill M. Wetter、Kennan C. Marsh、Michael F. Jarvis、Victoria E. Scott、Michael R. Schrimpf、Chih-Hung Lee
DOI:10.1016/j.bmcl.2013.06.074
日期:2013.9
A novel series of N-type calcium channel inhibitors have been discovered. Optimization of potency and HT-ADME properties provides 4-aminocyclopentapyrrolidines with analgesic efficacy after oral dosing.
NOVEL CYCLIC DEPSIPEPTIDE DERIVATIVES AND HARMFUL ORGANISM CONTROL AGENTS COMPRISING THE SAME
申请人:Meiji Seika Pharma Co., Ltd.
公开号:US20170215422A1
公开(公告)日:2017-08-03
An objective of the present invention is to provide novel cyclic depsipeptide derivatives and harmful organism control agents including the same as each other. Specifically, the present invention provides compounds represented by formula (1) or stereoisomers thereof, harmful organism control agents containing them, and a process for producing them.