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117811-87-7

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117811-87-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117811-87-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,8,1 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 117811-87:
(8*1)+(7*1)+(6*7)+(5*8)+(4*1)+(3*1)+(2*8)+(1*7)=127
127 % 10 = 7
So 117811-87-7 is a valid CAS Registry Number.

117811-87-7Relevant articles and documents

Novel asymmetric approach to proline-derived spiro-β-lactams

Khasanov, Alisher B.,Ramirez-Weinhouse, Michele M.,Webb, Thomas R.,Thiruvazhi, Mohan

, p. 5766 - 5769 (2004)

We describe a novel asymmetric approach using Staudinger chemistry to proline-derived spiro-β-lactams. A chiral group at C-4 of the acid chloride of proline directs the stereoselectivity of Staudinger chemistry and later is sacrificed to obtain optically active 5.4-spiro-β-lactams. The scope, limitations, and mechanistic rationale for the observed results of Staudinger Chemistry of the acid chloride of 4-alkyl(aryl)sulfonyloxy-L-proline with imines are also discussed.

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