117838-34-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117838-34-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,8,3 and 8 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 117838-34:
(8*1)+(7*1)+(6*7)+(5*8)+(4*3)+(3*8)+(2*3)+(1*4)=143
143 % 10 = 3
So 117838-34-3 is a valid CAS Registry Number.
117838-34-3Relevant articles and documents
A Versatile Synthesis of 2-Aryl-3,4-dihydro-4-oxobenzofuropyrimidines
Reddy, B. Saida,Reddy, A. Panduranga,Veeranagaiah, V.
, p. 581 - 582 (2007/10/02)
Reaction of 3-aminobenzofuran-2-carboxamide (1) with aromatic aldehydes (2) in acetic acid results in 3-N-(arylideneamino)benzofuran-2-carboxamides (3) and 2-aryl-3,4-dihydro-4-oxobenzofuropyrimidines (4) at steam-bath temperature.The reaction at r