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81197-44-6

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81197-44-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81197-44-6 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, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81197-44:
(7*8)+(6*1)+(5*1)+(4*9)+(3*7)+(2*4)+(1*4)=136
136 % 10 = 6
So 81197-44-6 is a valid CAS Registry Number.

81197-44-6Downstream Products

81197-44-6Relevant 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

Activated lactams: A one-step synthesis of azacycloalka[2,3-d]pyrimidine derivatives using ketene-S,N-acetals

Takahata,Tomiguchi,Nakano,Yamazaki

, p. 156 - 157 (2007/10/02)

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