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109988-88-7

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109988-88-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109988-88-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,9,8 and 8 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 109988-88:
(8*1)+(7*0)+(6*9)+(5*9)+(4*8)+(3*8)+(2*8)+(1*8)=187
187 % 10 = 7
So 109988-88-7 is a valid CAS Registry Number.

109988-88-7Downstream Products

109988-88-7Relevant articles and documents

Inversion of Configuration of the Vinylgroup at Carbon 12 by Reversible Retro-En-Cleavage

Berner, Heinz,Vyplel, Hermann,Schulz, Gerhard,Schneider, Helmut

, p. 1073 - 1080 (1986)

The reaction of pleuromutilin-22-O-tosylat(2) with EtZnI afforded a mixture of the 12-epimeric compounds 2 and 3.A reversible retro-en-reaction of the homoallylic system is discussed as a possible mechanistic pathway.The structure assignment is based on 1H- and 13C-NMR spectroscopic data. - Keywords: Pleuromutilin; Inversion of configuration; Reversible retro-en-cleavage; Simmons-Smith-reaction; Type I-"metallo-en"-reaction

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