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84647-23-4

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84647-23-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84647-23-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,6,4 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 84647-23:
(7*8)+(6*4)+(5*6)+(4*4)+(3*7)+(2*2)+(1*3)=154
154 % 10 = 4
So 84647-23-4 is a valid CAS Registry Number.

84647-23-4Relevant articles and documents

Zinc (II)-mediated selective O-benzylation of 2-Oxo-1,2-dihydropyridines systems

Zhou, Qifan,Du, Fangyu,Liang, Xinjie,Liu, Wenqiang,Fang, Ting,Chen, Guoliang

, (2018)

The selective O-benzylation of 2-oxo-1,2-dihydropyridines plays a critical role in organic synthesis of natural products and biological active molecules. Herein we report a novel ternary system of ZnO, ZnCl2 and N,N-diisopropylethylamine (DIEA), that is highly effective for selective O-benzylation of 2-oxo-1,2-dihydropyridines using abundant substituted benzyl halides and related substituted 2-oxo-1,2-dihydropyridines compounds. This process allows access to a variety of O-benzyl products under mild reaction conditions, which are important synthetic intermediates in the protection of functional groups, and represents a new method toward the development for the O-benzylation of 2-oxo-1,2-dihydropyridines.

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