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442851-51-6

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442851-51-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 442851-51-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,2,8,5 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 442851-51:
(8*4)+(7*4)+(6*2)+(5*8)+(4*5)+(3*1)+(2*5)+(1*1)=146
146 % 10 = 6
So 442851-51-6 is a valid CAS Registry Number.

442851-51-6Relevant articles and documents

Streamlined catalytic asymmetric synthesis of atorvastatin

Kawato, Yuji,Chaudhary, Sandeep,Kumagai, Naoya,Shibasaki, Masakatsu

supporting information, p. 3802 - 3806 (2013/04/24)

An efficient enantioselective synthetic route to atorvastatin was developed based on a direct catalytic asymmetric aldol reaction. The expensive chiral ligand used in the initial aldol reaction was readily recovered (91 %) and reused. Implementation of an oxy-Michael reaction for the construction of the syn-1,3-diol unit eliminated several redundant steps, allowing for rapid access to the common intermediate in six steps (see scheme). Copyright

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