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200420-37-7

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200420-37-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 200420-37-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,0,4,2 and 0 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 200420-37:
(8*2)+(7*0)+(6*0)+(5*4)+(4*2)+(3*0)+(2*3)+(1*7)=57
57 % 10 = 7
So 200420-37-7 is a valid CAS Registry Number.

200420-37-7Downstream Products

200420-37-7Relevant articles and documents

Total synthesis of (-)-verrucarol, a component of naturally occurring verrucarin A

Ishihara, Jun,Nonaka, Rie,Terasawa, Yuki,Shiraki, Ryota,Yabu, Kazuo,Kataoka, Hiromi,Ochiai, Yuichi,Tadano, Kin-Ichi

, p. 8311 - 8314 (1997)

Total synthesis of (-)-verrucarol (1) was achieved starting from D- glucose-derived bicyclic lactone 4 through 1) a stereoselective asymmetric quaternization of the α-carbon of the lactone, 2) Diechmann cyclization for access to the C-ring equivalent, 3) a skeletal rearrangement for the trichothecene ring system, and 4) the final stereoselective epoxidation of an exo-methylene group.

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