177938-09-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 177938-09-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,9,3 and 8 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 177938-09:
(8*1)+(7*7)+(6*7)+(5*9)+(4*3)+(3*8)+(2*0)+(1*9)=189
189 % 10 = 9
So 177938-09-9 is a valid CAS Registry Number.
177938-09-9Relevant articles and documents
Synthesis of 4-substituted methyl 3-(2,3-epoxy)propoxythiophene-2-carboxylates
Lissavetzky, Jaime,Manzanares, Ignacio
, p. 775 - 780 (2007/10/03)
The synthesis of 4-substituted methyl 3-hydroxythiophene-2-carboxylates is reported. The selective O-alkylation by two methods of these compounds gives the correspondent epoxy derivatives.
