934-21-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 934-21-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 9,3 and 4 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 934-21:
(5*9)+(4*3)+(3*4)+(2*2)+(1*1)=74
74 % 10 = 4
So 934-21-4 is a valid CAS Registry Number.
934-21-4Relevant articles and documents
Nucleophilic addition to acetylenes in superbasic catalytic systems: XVIII. Vinylation of phenols and naphthols with acetylene
Trofimov,Oparina,Kolyvanov,Vysotskaya,Gusarova
, p. 188 - 194 (2015/04/14)
Phenols and naphthols react with acetylene in a superbasic system KOH-DMSO forming the corresponding aryl vinyl ethers in up to 80% yields.
