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7556-52-7

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7556-52-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7556-52-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,5 and 6 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 7556-52:
(6*7)+(5*5)+(4*5)+(3*6)+(2*5)+(1*2)=117
117 % 10 = 7
So 7556-52-7 is a valid CAS Registry Number.

7556-52-7Downstream Products

7556-52-7Relevant articles and documents

Microwave-assisted amination from fluorobenzenes without catalyst and strong base

Meng, Xiangguo,Cai, Zhengyan,Xiao, Sa,Zhou, Weicheng

, p. 70 - 75 (2013/03/14)

A facile and versatile amination of fluorobenzenes has been developed in good to excellent yields under microwave irradiation in N-methylpyrrolidinone (NMP) without strong base and catalyst. The presence of additional halogen atom(s) enhanced the leaving ability of fluorine and meta fluorine gave higher activation than the ortho. It is remarkable that 1,2,3-trifluorobenzene, 1,2,4-trifluorobenzene and 1,2,4,5-tetrafluorobenzene can produce the regioselective mono-substituted products.

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