نتایج جستجو برای: ph3p
تعداد نتایج: 104 فیلتر نتایج به سال:
A series of coordination gold(III), palladium(II), and platinum(II) complexes with a luminescent iminophosphorane ligand derived from 8-aminoquinoline [Ph3P=N-C9H6N] (1), have been synthesized and structurally characterized. The coordination palladium(II) and platinum(II) compounds can evolve further, under appropriate conditions, to give stable cyclometalated endo species [M{κ3-C,N,N-C6H4(PPh2...
با توجه به خواص بیولوژیکی متنوع پیرولوپیرازینها، در این تحقیق مشتقات جدیدی از پیرولو[3،2-b]پیرازین با استفاده از کاتالیزگرهای پالادیم و مس سنتز گردید. از واکنش 6،5-دیکلروپیرازین-3،2-دیکربونیتریل با آمینهای آلیفاتیک و آروماتیک نوع اول در thf، ترکیبات 5-آلکیل(آریل)آمینو-6-کلروپیرازین-2،3-دیکربونیتریل با بهرهی بالا به دست آمد. ترکیبات سنتز شده با فنیلاستیلن، در حضور کاتالیزگرهای pd(ph3p)2...
Monodispersed Ag2Se nanocubes and faceted nanocrystals have been synthesized by hexadecylamine (HDA) induced thermolysis of [(PPh3)3Ag2(SeC{O}Ph)2] in a mixture of TOP (tri-n-octyl phosphine) and HDA in the temperature range 95-180 degrees C.
The utility of homogeneous gold complexes as carbophilic pacids has been well-established, with numerous reports of gold-catalyzed reactions that were initiated by addition of nucleophiles into unsaturated carbon–carbon bonds. Although protodeauration is common, several reactions have been developed in which the resulting organogold intermediate was intercepted. For example, nucleophilic reagen...
An efficient three-component reaction of dialkyl acetylendicarboxylates and 2-Pyrrolidin in the presence of triphenylphosphine produces dialkyl 2-(2-Pyrrolidin-N-yl)-3-(triphenylphosphanylidene)succinate. These phosphoranes undergo mild intramolecular Wittig reaction to produce dialkyl (E)-2-(4,5-dihydro-3H-pyrrol-2-yl)fumarate in excellent yields.
Bis-iminophosphoranes containing various types of linkers between two R3P==N moieties were electrochemically oxidized at controlled potential in situ in the electron spin resonance (ESR) cavity. For linkers constituted of phenylenes, conjugated phenylenes or merely a dicyanoethylenic bond, this oxidation led to well-resolved ESR spectra which were characterized by their g values and by their 1H...
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