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1233221-71-0

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1233221-71-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1233221-71-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,3,2,2 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1233221-71:
(9*1)+(8*2)+(7*3)+(6*3)+(5*2)+(4*2)+(3*1)+(2*7)+(1*1)=100
100 % 10 = 0
So 1233221-71-0 is a valid CAS Registry Number.

1233221-71-0Upstream product

1233221-71-0Relevant academic research and scientific papers

Total synthesis of (-)-tetrodotoxin from D-glucose: A new route to multi-functionalized cyclitol employing the ferrier(II) reaction toward (-)-tetrodotoxin

Akai, Shoji,Seki, Hidehito,Sugita, Naoki,Kogure, Tomokazu,Nishizawa, Naoki,Suzuki, Katsuhiko,Nakamura, Yutaka,Kajihara, Yasuhiro,Yoshimura, Juji,Sato, Ken-Ichi

experimental part, p. 279 - 287 (2010/06/17)

Total synthesis of (-)-tetrodotoxin (TTX) from D-glucose is described. As a critical transformation step for synthesizing TTX, a key multi-functionalized cyclitol was prepared from D-glucose employing the Ferrier(II) reaction. Stereospecific introduction of three functionalized branched chains were achieved via Peterson olefination and spiro α-chloroepoxidation of the corresponding carbonyl derivatives.

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