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402949-48-8

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402949-48-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 402949-48-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,2,9,4 and 9 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 402949-48:
(8*4)+(7*0)+(6*2)+(5*9)+(4*4)+(3*9)+(2*4)+(1*8)=148
148 % 10 = 8
So 402949-48-8 is a valid CAS Registry Number.

402949-48-8Relevant articles and documents

Synthesis of coumarins via PIDA/I2-mediated oxidative cyclization of substituted phenylacrylic acids

Li, Jinming,Chen, Huiyu,Zhang-Negrerie, Daisy,Du, Yunfei,Zhao, Kang

, p. 4311 - 4320 (2013/04/24)

A variety of functionalized coumarins were synthesized from substituted phenylacrylic acids via PIDA/I2-mediated and irradiation-promoted oxidative carbon-oxygen bond formation. Our studies show that the oxygen in the pendant carboxylic acid group cyclizes favorably to the aryl ring that is cis to it. The main advantages of this method include good functional group tolerance and the transition-metal-free characteristic. The Royal Society of Chemistry 2013.

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