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128143-54-4

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128143-54-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128143-54-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,1,4 and 3 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 128143-54:
(8*1)+(7*2)+(6*8)+(5*1)+(4*4)+(3*3)+(2*5)+(1*4)=114
114 % 10 = 4
So 128143-54-4 is a valid CAS Registry Number.

128143-54-4Downstream Products

128143-54-4Relevant academic research and scientific papers

Synthesis of 1,3-Dioxin-4ones and Their Use in Synthesis. XVII. Chiral Spirocyclic 4-Oxo-1,3-dioxin-5-carboxilates: Asymmetric Synthesis of Carbocyclic C-Nucleoside Precursors

Sato, Masayuki,Takayama, Kazuhisa,Kaneco, Chikara

, p. 2615 - 2620 (2007/10/02)

Synthesis of 2-spirocyclic 1,3-dioxin-4-ones and their Diels-Alder reaction with cyclopentadiene are described.The study provides not only a new route to chiral carbocyclic C-nucleoside precursors, but also a new methodology for asymmetric Diels-Alder rea

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