58095-77-5Relevant articles and documents
Tandem oxidation-dehydrogenation of (hetero)arylated primary alcohols via perruthenate catalysis
Bettencourt, Christian J.,Chow, Sharon,Moore, Peter W.,Read, Christopher D.G.,Jiao, Yanxiao,Bakker, Jan Peter,Zhao, Sheng,Bernhardt, Paul V.,Williams, Craig M.
, p. 652 - 659 (2021/09/08)
Tandem oxidative-dehydrogenation of primary alcohols to give a,b-unsaturated aldehydes in one pot are rare transformations in organic synthesis, with only two methods currently available. Reported herein is a novel method using the bench-stable salt methyltriphenylphosphonium perruthenate (MTP3), and a new co-oxidant NEMO&middoPF6 (NEMO = N-ethyl-N-hydroxymorpholinium) which provides unsaturated aldehydes in low to moderate yields. The Ley-Griffith oxidation of (hetero)arylated primary alcohols with N-oxide co-oxidants NMO (NMO = N-methylmorpholine N-oxide)/NEMO, is expanded by addition of the N-oxide salt NEMO&middoPF6 to convert the intermediate saturated aldehyde into its unsaturated counterpart. The discovery, method development, reaction scope, and associated challenges of this method are highlighted. The conceptual value of late-stage dehydrogenation in natural product synthesis is demonstrated via the synthesis of a polyene scaffold related to auxarconjugatin B.
Compound with piperine skeleton structure as well as preparation and application thereof
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, (2020/07/02)
The invention discloses a compound with a piperine skeleton structure as well as preparation and application of the compound, wherein the structural formulas of the compound are shown as a formula I-1and a formula I-2; in the formulas, R1 is hydrogen, halogen, nitryl or cyano, or substituted or unsubstituted hydroxyl, amino, carboxyl, ester group, hydrosulfenyl, acylamino, ureido, C1-C5 straight-chain or branched-chain alkyl and C1-C5 alkoxy; R2 is hydrogen, halogen, nitro or cyano, or substituted or unsubstituted hydroxyl, amino, carboxyl, ester group, hydrosulfenyl, acylamino, ureido, phenyl, aryl and aromatic heterocyclic group, or substituted or unsubstituted C1-C5 straight-chain or branched-chain alkyl, or substituted or unsubstituted C1-C5 alkoxy, or substituted or unsubstituted C6-C30 aryl, fused ring and fused heterocyclic ring. As a chitinase inhibitor, the compound provided by the invention has the advantages of high activity, good broad spectrum and easiness in synthesis, and shows excellent insecticidal ability and insecticidal spectrum.
Design of novel monoamine oxidase-B inhibitors based on piperine scaffold: Structure-activity-toxicity, drug-likeness and efflux transport studies
Borges, Fernanda,Chavarria, Daniel,Fernandes, Carlos,Gil-Martins, Eva,Oliveira, Paulo J.,Remi?o, Fernando,Silva, Catia,Silva, Renata,Silva, Tiago,Silva, Vera,Soares, Pedro
, (2019/11/26)
Piperine has been associated with neuroprotective effects and monoamine oxidase (MAO) inhibition, thus being an attractive scaffold to develop new antiparkinsonian agents. Accordingly, we prepared a small library of piperine derivatives and screened the inhibitory activities towards human MAO isoforms (hMAO-A and hMAO-B). Structure-activity relationship (SAR) studies pointed out that the combination of α-cyano and benzyl ester groups increased both potency and selectivity towards hMAO-B. Kinetic experiments with compounds 7, 10 and 15 indicated a competitive hMAO-B inhibition mechanism. Compounds 15 and 16, at 10 μM, caused a small but significant decrease in P-gp efflux activity in Caco-2 cells. Compound 15 stands out as the most potent piperine-based hMAO-B inhibitor (IC50 = 47.4 nM), displaying favourable drug-like properties and a broad safety window. Compound 15 is thus a suitable candidate for lead optimization and the development of multitarget-directed ligands.