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131542-49-9

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131542-49-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131542-49-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,5,4 and 2 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 131542-49:
(8*1)+(7*3)+(6*1)+(5*5)+(4*4)+(3*2)+(2*4)+(1*9)=99
99 % 10 = 9
So 131542-49-9 is a valid CAS Registry Number.

131542-49-9Upstream product

131542-49-9Downstream Products

131542-49-9Relevant articles and documents

Synthesis of 2-aminothiazoles from styrene derivatives mediated by 1,3-dibromo-5,5-dimethylhydrantoin (DBH)

Ma, Chunhua,Miao, Yuqi,Zhao, Minghao,Wu, Ping,Zhou, Jianglu,Li, Zhi,Xie, Xilei,Zhang, Wei

, p. 3602 - 3607 (2018)

An efficient procedure for the synthesis of 2-aminothiazoles via DBH-mediated oxidative cyclization of styrenes and thioureas is reported. Various alkenes were successfully transformed to the corresponding 2-aminothiazoles in yields of 10–81% via a two-step one-pot manner using DBH as both the bromine source and oxidant. The method can be readily carried out in gram-scale and successfully applied to the synthesis of anti-inflammatory drug fanetizole using styrene as starting material.

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