Discovery of +(2-{4-[2-(5,6,7,8-tetrahydro-1,8-naphthyridin-2-yl)ethoxy]phenyl}-cyclopropyl)acetic acid as potent and selective αvβ3 inhibitor: Design, synthesis, and optimization
摘要:
The integrin alpha(v)beta(3) is expressed in a number of cell types and is thought to play a major role in several pathological conditions. Various small molecules that inhibit the integrin have been shown to suppress tumor growth and retinal angiogenesis. The tripeptide Arg-Gly-Asp (RGD), a common binding motif in several ligands that bind to alpha(v)beta(3), has been depeptidized and optimized in our efforts toward discovering a small molecule inhibitor. We recently disclosed the synthesis and biological activity of several small molecules that did not contain any peptide bond and mimic the tripeptide RGD. The phenethyl group in one of the lead compounds was successfully replaced with a cyclopropyl moiety. The new lead compound was optimized for potency, selectivity, and for its ADME properties. We describe herein the discovery, synthesis, and optimization of cyclopropyl containing analogs that are potent and selective inhibitors of alpha(v)beta(3). (c) 2007 Elsevier Ltd. All rights reserved.
Radical-Cation Vinylcyclopropane Rearrangements by TiO<sub>2</sub> Photocatalysis
作者:Naoya Maeta、Hidehiro Kamiya、Yohei Okada
DOI:10.1021/acs.joc.0c00544
日期:2020.5.15
Radicalcation vinylcyclopropane rearrangements by TiO2 photocatalysis in lithium perchlorate/nitromethane solution are described. The reactions are triggered by oxidative single electron transfer, which is followed by immediate ring-opening of the cyclopropanes to generate distonic radicalcations as unique reactive intermediates. This approach can also be applied to vinylcyclobutane, leading to the
作者:Filippo De Simone、Julien Andrès、Riccardo Torosantucci、Jérôme Waser
DOI:10.1021/ol802970g
日期:2009.2.19
The first catalytic method for the cyclization of vinyl-cyclopropyl ketones (formal homo-Nazarov reaction) is reported. Starting from activated cyclopropanes, heterocyclic, and carbocyclic compounds were obtained under mild conditions using Bronsted acid catalysts. Preliminary investigation of the reaction mechanism indicated a stepwise process.
[EN] NOVEL PROCESSES FOR THE SYNTHESIS OF CYCLOPROPYL COMPOUNDS<br/>[FR] NOUVEAUX PROCESSUS DE SYNTHESE DE COMPOSES DE CYCLOPROPYLE
申请人:PHARMACIA CORP
公开号:WO2005051904A2
公开(公告)日:2005-06-09
This invention relates to processes for the preparation of cyclopropyl compounds of Formula: (I) wherein: x is an integer selected from the group consisting of 0, 1 and 2; R1 and R2 are independently selected from the group consisting of H, C1-C6 alkyl, and halo; and R3, R4, R5, R6 and R7 are independently selected from the group consisting of H, C1-C6 alkyl, C1-C6 alkoxy, and halo.