Cas 143520-99-4,methyl 4-(2-hydroxyethoxy)-6-oxo-2-phenyl-1H-pyrimidin-5-carboxylat

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Check Digit Verification of cas no

The CAS Registry Mumber 143520-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,5,2 and 0 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 143520-99:
(8*1)+(7*4)+(6*3)+(5*5)+(4*2)+(3*0)+(2*9)+(1*9)=114
114 % 10 = 4
So 143520-99-4 is a valid CAS Registry Number.

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143520-99-4Relevant academic research and scientific papers

Heterocycles Starting from Bis(alkoxycarbonyl)ketene Ethylene Acetals (=Dialkyl 2-(1,3-Dioxolan-2-ylidene)propane-1,3-dioate). Synthesis and Properties of a New Class of Pyrazolium Betaines

Neidlein, Richard,Schroeder, Guenter,Krieger, Claus,Kikelj, Danijel

, p. 1039 - 1051 (1992)

The readily available bis(alkoxycarbonyl)ketene ethylene acetals 1 react with bifunctional nucleophiles to give heterocycles 2-5 (Scheme 1).Their reactions with N,N-dialkylhydrazines lead to the pyrazolium betaines 7a-f (Scheme 4).Cyclic N,N-dialkylhydraz

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