81549-22-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81549-22-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,4 and 9 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 81549-22:
(7*8)+(6*1)+(5*5)+(4*4)+(3*9)+(2*2)+(1*2)=136
136 % 10 = 6
So 81549-22-6 is a valid CAS Registry Number.
81549-22-6Relevant articles and documents
The preparation of some thiochroman-3-ones and derivatives
Clark, Peter D.,McKinnon, David M.
, p. 243 - 248 (2007/10/02)
The use of 2,3-dihydrobenzothiophene-2,3-dione as a source of 2-mercaptophenylacetic acid permits a convenient preparation of 2-carboxymethylthiophenylacetic acid or derivatives.These undergo a Dieckmann cyclization to 3-acetoxybenzothiopyrans, which m
