Synthesis and biological evaluation of potential 5-HT7 receptor PET radiotracers
摘要:
Brain serotonin 7 receptor (5-HT7) is involved in several mood disorders and drug candidates targeting this subtype are currently in development. Positron emission tomography (PET) is a molecular imaging modality offering great promise for accelerating the process from preclinical discovery to clinical phases. As no PET radiopharmaceutical has yet been used successfully to study the 5-HT7 receptor in vivo, our objective is to develop the first 5-HT7 fluorine-18 labeled radiotracer.Four structural analogs of SB269970, a specific 5-HT7 receptor antagonist, divided in FP3 series and FPMP series were synthesized. Their antagonist effects were investigated by cellular functional assay. Nitro-precursors of these analogs were radiolabeled via a [F-18(-)]nucleophilic substitution and in vitro autoradiographies were performed in rat brain.Chemical and radiochemical purities of fluorine radiotracers were >99% with specific activities in 40 -129 GBq/mu mole range. The four derivates presented antagonism potencies toward 5-HT7 receptors (PKB) between 7.8 and 8.8. The four PET radiotracers had suitable characteristic for 5-HT7 receptor probing in vitro even if the FP3 series seemed to be more specific for this receptor. These results encourage us to pursue in vivo studies. (C) 2011 Elsevier Masson SAS. All rights reserved.
Asymmetrische elektrophile α-Amidoalkylierung, 4. Mitt.: Erzeugung und Abfangreaktionen 手性 N-Acylpyrrolidiniumionen
摘要:
Die Pyrrolderivate 1, 6 und 10 werden unter TiCl4-Katalysestereoselektiv mil dem Silylenolether 3 zu 2-substituierten Pyrrolidinamiden umgesetzt。6 sowie 10 (nach HCl-Addition = >11) sind noch bei -78°C reaktiv, wobei die Reaktion von 10 die von 6 in Ausbeute und Stereoselektivität übertrifft。
Conformationally restricted, spatially defined 12-30 membered macrocyclic ring systems of type (I) are constituted by three distinct building blocks: an aromatic template a, a conformation modulator b and a spacer moiety c as detailed in the description and the claims. Macrocycles of type (I) are readily manufactured by parallel synthesis or combinatorial chemistry. They are designed to interact with specific biological targets. In particular, they show agonistic or antagonistic activity on the motilin receptor (MR receptor), on the serotonin receptor of subtype 5-HT
2B
(5-HT
2B
receptor), and on the prostaglandin F2•receptor (FP receptor). They are thus potentially useful for the treatment of hypomotility disorders of the gastrointestinal tract such as diabetic gastroparesis and constipation type irritable bowl syndrome; of CNS related diseases like migraine, schizophrenia, psychosis or depression; of ocular hypertension such as associated with glaucoma and preterm labour.
Improved Protocol for Asymmetric, Intramolecular Heteroatom Michael Addition Using Organocatalysis: Enantioselective Syntheses of Homoproline, Pelletierine, and Homopipecolic Acid
作者:Erik C. Carlson、Lauren K. Rathbone、Hua Yang、Nathan D. Collett、Rich G. Carter
DOI:10.1021/jo800749t
日期:2008.7.1
indoline, and piperidine rings using an organocatalyzed, intramolecular heteroatom Michael addition is described. Application to the enantioselective synthesis of homoproline, homopipecolic acid, and pelletierine has been accomplished.
Disclosed herein are substituted benzhydrylethers of Formula I, processes of preparation thereof, pharmaceutical compositions thereof, and methods of their use thereof.
本文揭示了式I的取代苯基乙醚,其制备方法,药物组合物以及它们的使用方法。
RAPAFUCIN DERIVATIVE COMPOUNDS AND METHODS OF USE THEREOF
申请人:The Johns Hopkins University
公开号:US20210094933A1
公开(公告)日:2021-04-01
The present disclosure provides macrocyclic compounds inspired by the immunophilin ligand family of natural products FK506 and rapamycin. The generation of a Rapafucin library of macrocyles that contain FK506 and rapamycin binding domains should have great potential as new leads for developing drugs to be used for treating diseases.
BETA-HAIRPIN PEPTIDOMIMETICS AS SELECTIVE ELASTASE INHIBITORS
申请人:POLYPHOR AG
公开号:US20160333053A1
公开(公告)日:2016-11-17
β-Hairpin peptidomimetics of the general formula cyclo(-Xaa
1
-Xaa
2
-Thr
3
-Xaa
4
-Ser
5
-Xaa
6
-Xaa
7
-Xaa
8
-Xaa
9
-Xaa
10
-Xaa
11
-Xaa
12
-Xaa
13
-) and pharmaceutically acceptable salts thereof, with Xaa
1
, Xaa
2
, Xaa
4
, Xaa
6
, Xaa
7
, Xaa
8
, Xaa
9
, Xaa
10
, Xaa
11
, Xaa
12
and Xaa
13
being amino acid residues of certain types which are defined in the description and the claims, have elastase inhibitory properties, especially against human neutrophil elastase, and can be used for preventing infections or diseases related to such infections in healthy individuals or for slowing infections in infected patients. The compounds of the invention can further be used where cancer, or immunological diseases, or pulmonary diseases, or cardiovascular diseases, or neurodegenerative diseases, or inflammation, or diseases related to inflammation, are mediated or resulting from elastase activity. These peptidomimetics can be manufactured by a process which is based on a mixed solid- and solution phase synthetic strategy.