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17312-31-1

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17312-31-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 17312-31-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,3,1 and 2 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 17312-31:
(7*1)+(6*7)+(5*3)+(4*1)+(3*2)+(2*3)+(1*1)=81
81 % 10 = 1
So 17312-31-1 is a valid CAS Registry Number.

17312-31-1Relevant articles and documents

Concise Synthesis of Anti-HIV-1 Active (+)-Inophyllum B and (+)-Calanolide A by Application of (-)-Quinine-Catalyzed Intramolecular Oxo-Michael Addition

Sekino, Etsuko,Kumamoto, Takuya,Tanaka, Tomohiro,Ikeda, Tomoko,Ishikawa, Tsutomu

, p. 2760 - 2767 (2007/10/03)

(-)-Quinine-catalyzed intramolecular oxo-Michael addition (IMA) of 7-hydroxy-5-methoxy-8-tigloylcoumarins was developed for the enantioselective construction of 2,3-dimethyl-4-chromanone systems in the context of the asymmetric synthesis of anti-HIV-1 act

Synthesis of the calophyllum coumarins

Palmer, Christopher J.,Josephs, Jonathan L.

, p. 5363 - 5366 (2007/10/02)

Synthetic routes leading to the synthesis of the natural 4-alkyl and 4- phenyl coumarins isolated from Calophyllum sp. are reported. The reported structures of calanolides C and D and oblongutide are incorrect and have been corrected by unambiguous synthesis.

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