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198198-50-4

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198198-50-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 198198-50-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,8,1,9 and 8 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 198198-50:
(8*1)+(7*9)+(6*8)+(5*1)+(4*9)+(3*8)+(2*5)+(1*0)=194
194 % 10 = 4
So 198198-50-4 is a valid CAS Registry Number.

198198-50-4Relevant articles and documents

Stereocontrolled Synthesis of trans-3-Hydroxypipecolic Acids and Application to (-)-Swainsonine

Ferreira, Franck,Greck, Christine,Genet, Jean Pierre

, p. 615 - 622 (2007/10/03)

The enantioselective synthesis of both enantiomers of trans-3-hydroxypipecolic acid are described from a prochiral starting material: the methyl 3-oxo-7-methyloct-6-enoate.The stereocenters of the piperidine ring are created by enantioselective hydrogenation of the β-ketoester and by diastereoselective electrophilic amination of the β-hydroxyester enolate. (2R,3R)-3-Hydroxypipecolic acid methyl ester is the precursor for the synthesis of (-)-swainsonine. - Keywords: piperidine; indolizidine; chiral ruthenium complex; electrophilic amination.

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