117919-42-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117919-42-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,9,1 and 9 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 117919-42:
(8*1)+(7*1)+(6*7)+(5*9)+(4*1)+(3*9)+(2*4)+(1*2)=143
143 % 10 = 3
So 117919-42-3 is a valid CAS Registry Number.
117919-42-3Relevant articles and documents
(1+4) Cycloaddition of Vinyl Isocyanates with Isocyanides. Construction of Functionally Elaborate Pyrrolinone Derivatives
Rigby, James H.,Qabar, Maher,Ahmed, Gulzar,Hughes, Robert C.
, p. 10219 - 10228 (1993)
Reaction of alkyl isocyanides with vinyl isocyanates affords highly functionalized pyrrolinone and hydroindolone products via a novel (1+4) cyclization process.
