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82725-27-7

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82725-27-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 82725-27-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,7,2 and 5 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 82725-27:
(7*8)+(6*2)+(5*7)+(4*2)+(3*5)+(2*2)+(1*7)=137
137 % 10 = 7
So 82725-27-7 is a valid CAS Registry Number.

82725-27-7Relevant articles and documents

Synthesis of 1-Aryl-4-methylthio-2-azetidinones

Wiatschka, Alexander,Ongania, Karl-Hans

, p. 593 - 602 (2007/10/02)

The N-arylthioformimidates 4a-e, which may be obtained by S-alkylation of the thioformanilides 3a-e, react with chloroacetylchloride/triethylamine to yield the (3R,4S/3S,4R)-1-aryl-3-chloro-4-methylthio-2-azetidinones 5a-e and the formanilides 6a-e.Dehalogenation of 5b-e with tri-n-butyltinhydride yield the title compounds 7b-e.Hydrogenolysis of 7b and 7c yields 7f and 7g. - Keywords: 1-Aryl-3-chloro-4-methylthio-2-azetidinones; 1-Aryl-4-methylthio-2-azetidinones; Dehalogenation; N-Arylthioformimidates; Tri-n-butyltinhydride

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