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657393-34-5

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657393-34-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 657393-34-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,7,3,9 and 3 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 657393-34:
(8*6)+(7*5)+(6*7)+(5*3)+(4*9)+(3*3)+(2*3)+(1*4)=195
195 % 10 = 5
So 657393-34-5 is a valid CAS Registry Number.

657393-34-5Downstream Products

657393-34-5Relevant articles and documents

The synthesis of the anti-malarial natural product polysphorin and analogues using polymer-supported reagents and scavengers.

Lee, Ai-Lan,Ley, Steven V

, p. 3957 - 3966 (2007/10/03)

A general asymmetric route to both enantiomers of polysphorin has been developed. The route utilizes polymer-supported reagents, catalysts and scavengers to minimise the need for aqueous work-up and chromatography. This includes application of a method to scavenge 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and a "catch-and-release" procedure to extract the resultant diol following Sharpless asymmetric dihydroxylation. A novel enzymatic selective protection and investigations of a new asymmetric dihydroxylation using microencapsulated osmium tetroxide were also investigated during the course of this study.

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