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220985-65-9

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220985-65-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220985-65-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,9,8 and 5 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 220985-65:
(8*2)+(7*2)+(6*0)+(5*9)+(4*8)+(3*5)+(2*6)+(1*5)=139
139 % 10 = 9
So 220985-65-9 is a valid CAS Registry Number.

220985-65-9Downstream Products

220985-65-9Relevant articles and documents

Synthesis of optically pure Clausenamine-A and its demethoxylated analogs

Lin, Guoqiang,Zhang, Aimin

, p. 7163 - 7171 (2000)

The first total synthesis of Clausenamine-A (3) was developed involving the Suzuki cross-coupling and oxidative coupling reaction. The synthesis of its demethoxylated analogs 1 and 2 were also reported. Resolution of (+)-1, (+)-2, (+)-3 and (-)-1, (-)-2, (-)-3 were performed via their corresponding camphorsulfonates of the racemates. The absolute configurations of (+)-1, (+)-2, (+)-3 and (-)-1, (-)-2, (-)-3 were assigned as (aR) and (aS), respectively, by X-ray analysis and their CD spectrum. The primarily cytotoxic activities of these biscarbazoles against Plasmodium falciparum were briefly described. (C) 2000 Elsevier Science Ltd.

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