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474417-78-2

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474417-78-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 474417-78-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,7,4,4,1 and 7 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 474417-78:
(8*4)+(7*7)+(6*4)+(5*4)+(4*1)+(3*7)+(2*7)+(1*8)=172
172 % 10 = 2
So 474417-78-2 is a valid CAS Registry Number.

474417-78-2Relevant articles and documents

Practical synthesis of Boc-protected cis-4-trifluoromethyl and cis-4-difluoromethyl-L- prolines

Qiu, Xiao-long,Qing, Feng-ling

, p. 7162 - 7164 (2007/10/03)

A short, efficient, and diastereomerically pure synthesis of N-Boc-cis-4-trifluoromethyl-L-proline (7) and N-Boc-cis-4-difluoromethyl-L-proline (9) from N-Boc-4-oxo- L-proline (4) is described. The reaction of 4 with Me3SiCF3 and the conversion of the carbonyl group of 4 into the difluoromethylene group are the key steps for the synthesis of 7 and 9, respectively.

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