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156817-47-9

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156817-47-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156817-47-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,8,1 and 7 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 156817-47:
(8*1)+(7*5)+(6*6)+(5*8)+(4*1)+(3*7)+(2*4)+(1*7)=159
159 % 10 = 9
So 156817-47-9 is a valid CAS Registry Number.

156817-47-9Relevant articles and documents

Asymmetric total synthesis of (R)-α-cuparenone, (S)-cuparene and formal synthesis of (R)-β-cuparenone through Meinwald rearrangement and ring closing metathesis (RCM) reaction

Kumar, Rajan,Halder, Joydev,Nanda, Samik

, p. 809 - 818 (2017/01/16)

Asymmetric synthesis of enantiopure cuparenoid sesquiterpenes (R)-α-cuparenone, (S)-cuparene and a formal synthesis of (R)-β-cuparenone was presented in this article. Meinwald rearrangement of an enantiopure trisubstituted 2,3-epoxy alcohol derivative was

Intramolecular Photocycloaddition of the C=C Double Bond to the CN Triple Bond Resulting in the Formation of a Novel Cyclic System

Sakuragi, Hirochika,Koyama, Toshiya,Sakurazawa, Mamoru,Yasui, Norimichi,Tokumaru, Katsumi,Ueno, Katsuhiko

, p. 1769 - 1772 (2007/10/02)

Irradiation of a bichromophoric 1-(o-cyanobenzyloxy)-2-(p-methoxyphenyl)-2-butene (1a) in cyclohexane gave an isoquinoline derivative, 8-methoxy-6-methyl-11,13-dihydrobenzoxepinoisoquinoline (2a). The structure was determined by X-ray analysis. The formation of 2a can be accounted for by the initial cycloaddition of 1a in the excited singlet state between the C=C double bond and CN triple bond, followed by cleavage of the resulting azetine ring and recyclization.

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