Jan 17, 2024 · Under cooperative dicynopyrazine-derived chromophore (DPZ) as a photosensitizer and a chiral phosphoric acid catalyst, and Hantzsch ester as a sacrificial reductant, the transformations between α-substituted enones and cyanoazaarenes or 2- (chloromethyl)azaaren-1-iums can proceed a tandem reduction, radical coupling, and enantioselective protona...

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Sep 2, 2021 · Dicyanopyrazine (DPZ), a relatively lesser researched organophotoredox catalyst, has shown great potential through its catalytic activity in organic synthesis and necessitates attention of...

Dicyanopyrazine-derived (DPZ) push–pull chromophores have been demonstrated as a new kind of organic catalysts for photoredox catalysis. 2-Methoxythienyl as an electron-donating moiety provides a DPZ derivative (H) with a broad absorption edge reaching up to 500 nm as well as the excellent redox properties.

Feb 1, 2024 · DPZ and DPZ• – (radical anion) absorption (a) and fsTA spectra (b) and evolution associated spectra (EAS) results of global analysis (c) along with decay of amplitude of EAS (d) for *DPZ• – (radical anion) in DMF λ ex = 525 nm.

Cholinergic deficit has been reported to be the major pathological cause for AD. In this case, the use of some acetylcholinesterase (AChE) inhibitors including galantamine, risvastigmine, and donepezil hydrochloride (DPZ) have been used to improve cholinergic function.

Donepezil (DPZ) is widely used in the treatment of Alzheimer’s disease in tablet form for oral administration. The pharmacological efficacy of this drug can be enhanced by the use of intranasal administration because this route makes bypassing the …

In our work, a reliable, specific, and rapid enantioselective HPLC-MS/MS method has been established and fully validated for the quantification of R- and S-DPZ in rat plasma. After plasma alkalization (with 1 M Na 2 CO 3), DPZ enantiomers and diphenhydramine (IS) were extracted using ethyl acetate. Completely separation of R- and S-DPZ (Rs = 2. ...

在这里，我们报道了双氰基吡嗪（DPZ）衍生的推挽发色团，易于制备且可调节的有机化合物，是新型的光氧化还原催化剂。 特别地，包含2-甲氧基噻吩基作为供电子部分的DPZ衍生物H表现出对可见光的广泛吸收，具有高达500nm的吸收边缘和优异的氧化还原性能，并且已被证明是理想的活性和有效的光氧化还原催化剂。 在四种具有挑战性的光氧化还原反应中 在大多数反应中催化剂的量小于0.1mol％，甚至0.01mol％，代表了当前光氧化还原有机催化剂中最低的催化剂负载量。

May 29, 2012 · An in vivo study carried out in rats showed that O -demethylation, N -dealkylation, and N -oxidation are the main reactions involved in the biotransformation of DPZ. In addition, this study showed the predominant formation of the metabolite 6- O …