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855740-21-5

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855740-21-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 855740-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,5,7,4 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 855740-21:
(8*8)+(7*5)+(6*5)+(5*7)+(4*4)+(3*0)+(2*2)+(1*1)=185
185 % 10 = 5
So 855740-21-5 is a valid CAS Registry Number.

855740-21-5Relevant articles and documents

Practical metal-free synthesis of chalcone derivatives via a tandem cross-dehydrogenative-coupling/elimination reaction

Wei, Yu,Tang, Jinghua,Cong, Xuefeng,Zeng, Xiaoming

, p. 3165 - 3169 (2013)

Metal-free synthesis of chalcone derivatives through a tandem cross-dehydrogenative-coupling/elimination reaction is described. A simple and inexpensive ammonium persulfate salt enables the reaction between ketones and benzylamines to proceed with high stereoselectivity and good functional group compatibility.

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