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1447820-21-4

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1447820-21-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1447820-21-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,4,7,8,2 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1447820-21:
(9*1)+(8*4)+(7*4)+(6*7)+(5*8)+(4*2)+(3*0)+(2*2)+(1*1)=164
164 % 10 = 4
So 1447820-21-4 is a valid CAS Registry Number.

1447820-21-4Relevant articles and documents

Streamlined catalytic asymmetric synthesis of atorvastatin

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

, p. 3802 - 3806 (2013)

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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