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111867-59-5

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111867-59-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111867-59-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,8,6 and 7 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 111867-59:
(8*1)+(7*1)+(6*1)+(5*8)+(4*6)+(3*7)+(2*5)+(1*9)=125
125 % 10 = 5
So 111867-59-5 is a valid CAS Registry Number.

111867-59-5Relevant articles and documents

Reagents and Synthetic Methods. Part 58. Synthesis of β-Lactams from Acetic Acids and Imines promoted by Vilsmeier Type Reagents

Arrieta, Ana,Lecea, Begona,Palomo, Claudio

, p. 845 - 850 (2007/10/02)

The development of a practical method for the stereospecific preparation of several 3-substituted β-lactams from acetic acids and imines is described.The key step of the method is the activation of the carboxy component by means of Vilsmeier type reagents.The preparation of some N-(2'-hydroxyethyl)-β-lactams and N-(p-dimethyl-t-butylsiloxyphenyl)-β-lactams as intermediates for N-H azetidinones is also reported.For the last compounds the steric bulk of the N-substituent is the key feature for a high cis-β-lactam formation.

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