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1250257-91-0

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1250257-91-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1250257-91-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,0,2,5 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1250257-91:
(9*1)+(8*2)+(7*5)+(6*0)+(5*2)+(4*5)+(3*7)+(2*9)+(1*1)=130
130 % 10 = 0
So 1250257-91-0 is a valid CAS Registry Number.

1250257-91-0Downstream Products

1250257-91-0Relevant articles and documents

Suzuki-Miyaura reactions of N-protected tribromopyrazoles. Efficient and site-selective synthesis of 3,4,5-triaryl-pyrazoles, 3,5-diaryl-4-bromopyrazoles and 5-aryl-3,4-dibromopyrazoles

Khera, Rasheed Ahmad,Ali, Asad,Rafique, Hummera,Hussain, Munawar,Tatar, Jovana,Saeed, Aamer,Villinger, Alexander,Langer, Peter

experimental part, p. 5244 - 5253 (2011/08/04)

Suzuki-Miyaura reactions of N-protected tribromopyrazoles were studied. The reactions proceed with excellent site-selectivity. The first attack occurs at position 5, while the second and third attack occur at positions 3 and 4, respectively. A variety of 3,4,5-triaryl-pyrazoles, 3,5-diaryl-4-bromopyrazoles, and 5-aryl-3,4-dibromopyrazoles were efficiently prepared. The products are not readily available by other methods.

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