881889-90-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 881889-90-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,8,1,8,8 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 881889-90:
(8*8)+(7*8)+(6*1)+(5*8)+(4*8)+(3*9)+(2*9)+(1*0)=243
243 % 10 = 3
So 881889-90-3 is a valid CAS Registry Number.
881889-90-3Relevant articles and documents
Synthesis of 3-aroylnicotinonitriles from aroylketene dithioacetals
Anabha,Nirmala,Thomas, Abraham,Asokan
, p. 428 - 432 (2008/01/08)
The Knoevenagel adducts of 2-aroyl-3,3-bis(alkylsulfanyl)acrylaldehydes and malononitrile were cyclized in the presence of diisopropylamine to afford 5-aroyl-2,6-bis(methylsulfanyl)nicotinonitriles. Cyclization in the presence of aqueous ammonia gave 2-am
