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253342-51-7

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253342-51-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 253342-51-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,3,3,4 and 2 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 253342-51:
(8*2)+(7*5)+(6*3)+(5*3)+(4*4)+(3*2)+(2*5)+(1*1)=117
117 % 10 = 7
So 253342-51-7 is a valid CAS Registry Number.

253342-51-7Downstream Products

253342-51-7Relevant articles and documents

Protonation and cyclization of 1,3-diarylpropynones in superacids

Vasil'ev,Walspurger,Pale,Sommer,Haouas,Rudenko

, p. 1769 - 1778 (2007/10/03)

1,3-Diarylpropynones ArC≡CCOAr′ in superacids with H 0 ranging from -20 to - 14 undergo protonation at the carbonyl oxygen atoms to give stable ArC≡CC(O+H)Ar′ ions or at the acetylenic C2 atom with formation of reactive Ar

A new, fast and efficient synthesis of 3-aryl indenones: Intramolecular cyclization of 1,3-diarylpropynones in superacids

Vasilyev, Aleksander V.,Walspurger, Stéphane,Pale, Patrick,Sommer, Jean

, p. 3379 - 3381 (2007/10/03)

1,3-Diarylpropynones were cleanly converted to the corresponding 3-arylindenones in various superacidic media. This new, simple, one-pot reaction proved to be efficient (yields up to 95%) and very fast (reaction time less than 30min).

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