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205522-38-9

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205522-38-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 205522-38-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,5,2 and 2 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 205522-38:
(8*2)+(7*0)+(6*5)+(5*5)+(4*2)+(3*2)+(2*3)+(1*8)=99
99 % 10 = 9
So 205522-38-9 is a valid CAS Registry Number.

205522-38-9Relevant articles and documents

PH-Controlled Intramolecular Decarboxylative Cyclization of Biarylacetic Acids: Implication on Umpolung Reactivity of Aroyl Radicals

Breugst, Martin,Gulati, Upma,Laha, Joydev K.,Saima,Schulte, Tim

, (2022/05/18)

A simple approach for the intramolecular aroylation of electron-rich arenes under mild conditions has been developed. A pH-controlled polarity umpolung strategy can be used to synthesize different fluorenones, which are important building blocks for biological applications. Unlike previous acylation reactions involving nucleophilic aroyl radicals, this approach likely relies on in situ generated electrophilic aroyl radicals. Detailed mechanistic and computational investigations provide detailed insights into the reaction mechanism and support the hypothesis of a pH-mediated umpolung.

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