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143022-93-9

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143022-93-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143022-93-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,0,2 and 2 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 143022-93:
(8*1)+(7*4)+(6*3)+(5*0)+(4*2)+(3*2)+(2*9)+(1*3)=89
89 % 10 = 9
So 143022-93-9 is a valid CAS Registry Number.

143022-93-9Downstream Products

143022-93-9Relevant articles and documents

Double Enantioselective Transesterification of Racemic Carboxylic Esters and Cycil meso-Diols by Lipase Catalysis

Theil, Fritz,Kunath, Annamarie,Ramm, Matthias,Reiher, Thomas,Schick, Hans

, p. 1509 - 1516 (2007/10/02)

Lipase-catalysed double enantioselective transesterifications of racemic carboxylic esters and cyclic meso-diols to give the hydroxy esters 3, 6, 9, 11 and 14 have been investigated.The selectivity of this process is determined by the structure of both substrates and the origin of the lipase.In four of the five cases investigated, lipase SP 382 shows the highest activity and selectivity.In the products, excepting the acyl part of compounds 3, (S)-selectivity for both the alcohol and the acyl mojety has been observed.However, regarding the acyl part the selectivity is poor compared with that of the alcohol part.Application of this method allows us to prepare enantiomerically pure compounds with at least three asymmetric centres in one biocatalytic step if the reaction partners are matching and/or the products are easy to separate as found for compounds 9a, 9c and 11a for instance. the X-ray molecular strucutres of compounds 9a and 11a are reported.

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