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70216-33-0

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70216-33-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 70216-33-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,2,1 and 6 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 70216-33:
(7*7)+(6*0)+(5*2)+(4*1)+(3*6)+(2*3)+(1*3)=90
90 % 10 = 0
So 70216-33-0 is a valid CAS Registry Number.

70216-33-0Relevant articles and documents

Synthesis of α-Amidoketones through the Cascade Reaction of Carboxylic Acids with Vinyl Azides under Catalyst-Free Conditions

Gao, Cai,Zhou, Qianting,Yang, Li,Zhang, Xinying,Fan, Xuesen

, p. 13710 - 13720 (2020/11/13)

An efficient synthesis of α-amidoketone derivatives through the cascade reactions of carboxylic acids with vinyl azides is presented. Compared with literature protocols, notable features of this new method include catalyst-free conditions, broad substrate scope, good tolerance of a wide range of functional groups, and high efficiency. In addition, the synthetic potential of this method as a tool for late-stage modification was convincingly manifested by its application in the structural elaborations of a number of carboxylic acid drug molecules.

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