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123839-74-7

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123839-74-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 123839-74-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,8,3 and 9 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 123839-74:
(8*1)+(7*2)+(6*3)+(5*8)+(4*3)+(3*9)+(2*7)+(1*4)=137
137 % 10 = 7
So 123839-74-7 is a valid CAS Registry Number.

123839-74-7Relevant articles and documents

Reversal of the regioselectivity of anthrapyrazole formation. A new synthesis of Losoxantrone (DUP941)

Zhang, Lin-Hua,Meier, Walter E.,Watson, Elton J.,Gibson, Emily P.

, p. 3675 - 3678 (2007/10/02)

Losoxantrone, a potent anticancer agent, has been efficiently synthesized in a 6 step process from 5-hydroxy-1,4- dichloroanthracene-9,10-dione.

Process for preparing substituted anthra[1,9-cd]pyrazol-6(2H)-ones

-

, (2008/06/13)

An improved process for producing anthra[1,9-cd]-pyrazol-6(2H)-ones from 1,4-dichloro-5,8-disubstituted 9,10-anthracenediones. The process produces higher yields by using a new combination of protecting groups on the compounds which allows for easier and cleaner chromatographic resolution. The compounds produced have antibacterial, antifungal, antileukemic, and antitumor activity.

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