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52870-45-8

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52870-45-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52870-45-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,8,7 and 0 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 52870-45:
(7*5)+(6*2)+(5*8)+(4*7)+(3*0)+(2*4)+(1*5)=128
128 % 10 = 8
So 52870-45-8 is a valid CAS Registry Number.

52870-45-8Relevant articles and documents

Novel syntheses of 2,3-dihydro-1,5-benzothiazepin-4(5H)-ones and 2H-1,4-benzothiazin-3(4H)-ones

Katritzky,Odens,Zhang,Rostek,Maender

, p. 6792 - 6796 (2001)

Nucleophilic additions of α-mercaptoalkanoate esters and β-mercaptoalkanoate acids to benzoquinone diimines, followed by cyclization with trifluoroacetic acid or 1,3-dicyclohexylcarbodiimide (DCC), provide novel, high-yielding syntheses of 2H-1,4-benzothiazin-3(4H)-ones (3a-f) and 2,3-dihydro-1,5-benzothiazepin-4(5H)-ones (5a-c), respectively.

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