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157722-43-5

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157722-43-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157722-43-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,7,2 and 2 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 157722-43:
(8*1)+(7*5)+(6*7)+(5*7)+(4*2)+(3*2)+(2*4)+(1*3)=145
145 % 10 = 5
So 157722-43-5 is a valid CAS Registry Number.

157722-43-5Relevant articles and documents

Application of Yeast-Catalyzed Reductions to Synthesis of (2R,3S)-Phenylisoserine

Kearns, Jeff,Kayser, Margaret

, p. 2845 - 2848 (2007/10/02)

A simple synthesis of (2R,3S)-phenylisoserine, a precursor of the C-13 side chain of Taxol (paclitaxel), utilising yeast-catalyzed reduction to generate a second chiral centre is reported.This short enantioselective series of transformations can be readily adapted to large scale production of a variety of N-substituted paclitaxel analogues.

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