311333-74-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 311333-74-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,1,1,3,3 and 3 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 311333-74:
(8*3)+(7*1)+(6*1)+(5*3)+(4*3)+(3*3)+(2*7)+(1*4)=91
91 % 10 = 1
So 311333-74-1 is a valid CAS Registry Number.
311333-74-1Relevant articles and documents
Substituted 4-Amino-thienoisothiazoles and 4-Amino-thienoisothiazoles
Gewald, K.,Radke, W.,Hain, U.
, p. 1021 - 1031 (2007/10/02)
The alkylation of disodium-(4-cyanisothiazole-3,5)-dithiolate 1 with α-chloro carbonyl compounds followed by Thorpe-Ziegler-cyclization yields the substituted 4-amino-thienoisothiazoles 3, which can be converted into the thieno-isothiazolo-1,4-thia