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133552-01-9

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133552-01-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133552-01-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,5,5 and 2 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 133552-01:
(8*1)+(7*3)+(6*3)+(5*5)+(4*5)+(3*2)+(2*0)+(1*1)=99
99 % 10 = 9
So 133552-01-9 is a valid CAS Registry Number.

133552-01-9Relevant articles and documents

Chemoenzymatic Asymmetric Total Synthesis of Nonanolide (Z)-Cytospolides D, e and Their Stereoisomers

Rej, Rohan Kalyan,Nanda, Samik

, p. 860 - 871 (2015/10/05)

Chemoenzymatic asymmetric total synthesis of the (Z)-isomer of the naturally occurring decanolide cytospolides D, E and six stereoisomers is reported. The main highlight of the synthetic venture involves ring-closing metathesis (RCM) reaction of a suitably functionalized ester compound, which was assembled by the Yamaguchi coupling of the required acid and alcohol fragments. The alcohol fragment was accessed by two alternative chemoenzymatic processes, one being hydroxynitrile lyase mediated hydrocyanation, whereas lipase-catalyzed transesterification was the key sep in the second route. The acid fragment was constructed by an enantioselective enzymatic desymmetrization (EED) of prochiral 2-methyl-1,3-propanediol and Corey-Bakshi-Shibata (CBS) mediated stereoselective carbonyl reduction.

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