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81197-50-4

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81197-50-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81197-50-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,9 and 7 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81197-50:
(7*8)+(6*1)+(5*1)+(4*9)+(3*7)+(2*5)+(1*0)=134
134 % 10 = 4
So 81197-50-4 is a valid CAS Registry Number.

81197-50-4Downstream Products

81197-50-4Relevant articles and documents

Ketene-S,N-acetals as Synthetic Intermediates for Heterocycles. Reaction of Ketene-S,N-acetals with Aryl Isocyanates

Takahata, Hiroki,Nakajima, Tomoko,Nakano, Masaharu,Tomiguchi, Akira,Yamazaki, Takao

, p. 4299 - 4308 (2007/10/02)

Reaction of ketene-S,N-acetals (1-6), which are useful synthetic intermediates for heterocycles, with aryl isocyanates (7) is described.Annulation of 1-3 and 4-6 with 7 in boiling toluene gave bicyclic (8-10) and monocyclic (11-13) uracil derivatives, res

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