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75029-37-7

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75029-37-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 75029-37-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,0,2 and 9 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 75029-37:
(7*7)+(6*5)+(5*0)+(4*2)+(3*9)+(2*3)+(1*7)=127
127 % 10 = 7
So 75029-37-7 is a valid CAS Registry Number.

75029-37-7Relevant articles and documents

Photochemistry of Heterocycles, 8. The Photoreaction of 2,5-Diaryl-1,3,4-oxadiazoles with 1,3-Dimethyluracils. A New and Simple Synthesis of 1,2,4,5-Tetrazines

Farkas, Lajos,Keuler, Josef,Wamhoff, Heinrich

, p. 2566 - 2574 (2007/10/02)

Upon UV-irradiation 2,5-diaryl-1,3,4-oxadiazoles 2a-g do not undergo (2+2)-cycloaddition with 1,3-dimethyluracil, but instead ring cleavage occurs to afford the benzoylhydrazones 3a-e as well as the decomposition products 4-6.With 6-chloro-1,3-dimethyluracil (1b) 3h is formed, which in turn photoeliminates benzoyl chloride to give the pyrazolopyrimidine 7.Saponification of 3a gives smoothly 5-benzoyl-1,3-dimethyluracil (photoselective 5-benzoylation). - A new and simple synthesis of 3,6-disubstituted 1,2,4,5-tetrazines from aroylhydrazines is described, employing the system triphenylphosphane/hexachloroethane/triethylamine.

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