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17881-58-2

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17881-58-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 17881-58-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,8,8 and 1 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 17881-58:
(7*1)+(6*7)+(5*8)+(4*8)+(3*1)+(2*5)+(1*8)=142
142 % 10 = 2
So 17881-58-2 is a valid CAS Registry Number.

17881-58-2Relevant articles and documents

Novel one-pot synthesis of xanthones via sequential fluoride ion-promoted fries-type rearrangement and nucleophilic aromatic substitution

Fujimoto, Yuuki,Itakura, Ryohei,Hoshi, Hiroki,Yanai, Hikaru,Ando, Yoshio,Suzuki, Keisuke,Matsumoto, Takashi

supporting information, p. 2575 - 2580 (2013/12/04)

A novel and efficient synthesis of xanthones is described. 2-(Trimethylsilyl)phenyl 2-fluorobenzoate derivatives undergo Fries-type rearrangement and intramolecular SNAr reaction in a one-pot sequential manner under fluoride ion-promoted mild conditions. The method provides efficient access to xanthones that have significant steric congestion around the C9 carbonyl, which are not readily available by conventional methods. Georg Thieme Verlag Stuttgart · New York.

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