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1234331-56-6

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1234331-56-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1234331-56-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,4,3,3 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1234331-56:
(9*1)+(8*2)+(7*3)+(6*4)+(5*3)+(4*3)+(3*1)+(2*5)+(1*6)=116
116 % 10 = 6
So 1234331-56-6 is a valid CAS Registry Number.

1234331-56-6Relevant articles and documents

Diastereoselective synthesis of pitavastatin calcium via bismuth-catalyzed two-component hemiacetal/oxa-Michael addition reaction

Xiong, Fangjun,Wang, Haifeng,Yan, Lingjie,Xu, Lingjun,Tao, Yuan,Wu, Yan,Chen, Fener

, p. 9813 - 9819 (2015)

An efficient and concise asymmetric synthesis of pitavastatin calcium (1) starting from commercially available (S)-epichlorohydrin is described. A convergent C1 + C6 route allowed for the assembly of the pitavastatin C7 side chain via a Wittig reaction between phosphonium salt 2 and the enantiomerically pure C6-formyl side chain 3. The 1,3-syn-diol acetal motif in 3 was established with excellent stereo control by a diastereoselective bismuth-promoted two-component hemiacetal/oxa-Michael addition reaction of (S)-α,β-unsaturated ketone 4 with acetaldehyde.

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