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104557-13-3

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104557-13-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 104557-13-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,5,5 and 7 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 104557-13:
(8*1)+(7*0)+(6*4)+(5*5)+(4*5)+(3*7)+(2*1)+(1*3)=103
103 % 10 = 3
So 104557-13-3 is a valid CAS Registry Number.

104557-13-3Relevant articles and documents

REGIOSELECTIVE PROTECTION OF CARBOHYDRATE DERIVATIVES. PART. 20. SIMPLE, EFFICIENT 2'-O-DEACYLATION OF FULLY ACYLATED PURINE AND PYRIMIDINE RIBONUCLEOSIDES THROUGH tert-BUTOXIDE

Nishino, Shigeyoshi,Takamura, Hatsuko,Ishido, Yoshiharu

, p. 1995 - 2004 (2007/10/02)

A simple treatment of fully aroylated purine and pyrimidine ribonucleosides with pulverized potassium tert-butoxide in tetrahydrofuran (THF) or dichloromethane under a controlled condition gave a mixture of the corresponding di-O-aroyl derivatives in which 2'-OH derivatives are preponderant over 3'-OH derivatives; 3',5'-di-O-benzoyluridine, N4,3',5'-tribenzoylcytidine, N4,3',5'-tri-O-toluoylcytidine, N2,3',5'-tribenzoylguanosine, and N2,isobutyryl-3',5'-di-O-benzoylguanosine were obtained crystalline in 80 percent, 78 percent, 72 percent, 67 percent, and 65 percent yields, respectively.

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