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2(1H)-Quinolinone, 3-hydroxy-4-(4-nitrophenyl)- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

99557-41-2

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99557-41-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99557-41-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,5,5 and 7 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 99557-41:
(7*9)+(6*9)+(5*5)+(4*5)+(3*7)+(2*4)+(1*1)=192
192 % 10 = 2
So 99557-41-2 is a valid CAS Registry Number.

99557-41-2Relevant academic research and scientific papers

Regioselective Ring Expansion of Isatins with in Situ Generated α-Aryldiazomethanes: Direct Access to Viridicatin Alkaloids

Tangella, Yellaiah,Manasa, Kesari Lakshmi,Krishna, Namballa Hari,Sridhar,Kamal, Ahmed,Nagendra Babu, Bathini

, p. 3639 - 3642 (2018)

A novel efficient one-pot regioselective ring-expansion reaction of isatins with in situ generated α-aryl/heteroaryldiazomethanes for the construction of viridicatin alkaloids has been described under metal-free conditions. The utility of this protocol is further demonstrated in the synthesis of naturally occurring viridicatin, viridicatol, and substituted 3-O-methyl viridicatin and their scale up.

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