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343239-89-4

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343239-89-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 343239-89-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,3,2,3 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 343239-89:
(8*3)+(7*4)+(6*3)+(5*2)+(4*3)+(3*9)+(2*8)+(1*9)=144
144 % 10 = 4
So 343239-89-4 is a valid CAS Registry Number.

343239-89-4Upstream product

343239-89-4Downstream Products

343239-89-4Relevant articles and documents

METHOD FOR THE PREPARATION OF OPTICALLY ACTIVE 2-SULFONYLOXY-1-PHENYLETHANOL DERIVATIVES

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Page/Page column 21-22, (2008/12/05)

Optically active 2-sulfonyloxy-1-phenylethanol derivative of formula (II) can be prepared easily and selectively by the method of the present invention using an asymmetric reduction of an α-sulfonyloxy acetophenone compound with a rhodium catalyst having petamethylcyclopentadienyl group and a hydrogen donor, and the compound of formula (II) obtained in the inventive method exhibits a higher e.e. (enantiomer excess) value than that of the products in the conventional methods.

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