135765-24-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 135765-24-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,7,6 and 5 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 135765-24:
(8*1)+(7*3)+(6*5)+(5*7)+(4*6)+(3*5)+(2*2)+(1*4)=141
141 % 10 = 1
So 135765-24-1 is a valid CAS Registry Number.
135765-24-1Relevant articles and documents
Regioselective alkylation of 4-hydroxy-1-benzothiopyran-2(H)-thione
Majumdar, K C,Khan, A T,Saha, S
, p. 643 - 645 (2007/10/02)
Alkylation of 4-hydroxy-1-benzothiopyran-2(H)-thione (1) with dimethyl sulphate and a number of alkyl halides by PTC technique gives 2-alkylthio-1-benzothiopyran-4(H)-ones (2) in almost quantitative yields except in the case of 2,3-dichloro-2-propene.The