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231301-00-1

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231301-00-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 231301-00-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,3,1,3,0 and 1 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 231301-00:
(8*2)+(7*3)+(6*1)+(5*3)+(4*0)+(3*1)+(2*0)+(1*0)=61
61 % 10 = 1
So 231301-00-1 is a valid CAS Registry Number.

231301-00-1Relevant articles and documents

A novel one-step diastereo- and enantioselective formation of trans- azetidinones and its application to the total synthesis of cholesterol absorption inhibitors

Wu,Wong,Chen,Ding

, p. 3714 - 3718 (1999)

An efficient and practical asymmetric process was developed for the synthesis of azetidinone-based cholesterol absorption inhibitors. Key to this synthesis was the discovery of a novel one-step diastereo- and enantioselective formation of trans β-lactams starting from commercially available 3(S)-hydroxy-γ-lactone. Various trans β-lactams can be prepared in good yields and with better than 95:5 enantio- and diastereoselctivity. A Lewis acid-catalyzed aldol condensation and a highly enantioselective oxazaborolidine-catalyzed chiral reduction completes the side chain.

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