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28999-67-9

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28999-67-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28999-67-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,9,9 and 9 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 28999-67:
(7*2)+(6*8)+(5*9)+(4*9)+(3*9)+(2*6)+(1*7)=189
189 % 10 = 9
So 28999-67-9 is a valid CAS Registry Number.

28999-67-9Downstream Products

28999-67-9Relevant articles and documents

One-pot formic acid dehydrogenation and synthesis of benzene-fused heterocycles over reusable AgPd/WO2.72 nanocatalyst

Yu, Chao,Guo, Xuefeng,Shen, Bo,Xi, Zheng,Li, Qing,Yin, Zhouyang,Liu, Hu,Muzzio, Michelle,Shen, Mengqi,Li, Junrui,Seto, Christopher T.,Sun, Shouheng

, p. 23766 - 23772 (2018)

Using nanoparticles (NPs) to catalyze multiple chemical reactions in one-pot and to achieve high-yield syntheses of functional molecules/materials is an important direction in NP chemistry, catalysis and applications. In this article, we report a nanocomposite of AgPd NPs anchored on WO2.72 nanorods (NRs) (denoted as AgPd/WO2.72) as a general catalyst for formic acid dehydrogenation and transfer hydrogenation from Ar-NO2 to Ar-NH2 that further reacts with aldehydes to form benzene-fused heterocyclic compounds. The AgPd/WO2.72 catalysis is Ag/Pd dependent and Ag48Pd52 is the most active composition for the multiple chemical reactions. The high activity of AgPd/WO2.72 arises from strong interfacial interaction between AgPd and WO2.72, resulting in AgPd lattice expansion and electron polarization from AgPd to WO2.72. The syntheses proceed in one-pot reactions among formic acid, 2-nitrophenol (or 2-nitroaniline, or 2-nitrothiophenol) and aldehydes in dioxane/water (2/1 v/v) at 80-90 °C, leading to one-pot syntheses of benzoxazoles, benzimidazoles and benzothiazoles that are key ring structures present in functional compounds for pharmaceutical, optical and polymer applications.

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