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56221-31-9

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56221-31-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56221-31-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,2,2 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 56221-31:
(7*5)+(6*6)+(5*2)+(4*2)+(3*1)+(2*3)+(1*1)=99
99 % 10 = 9
So 56221-31-9 is a valid CAS Registry Number.

56221-31-9Relevant academic research and scientific papers

Sodium nitrite-catalyzed aerobic oxidative Csp2-Csp3 coupling: Direct construction of the 4-aryldihydroisoquinolinone moiety

Su, Bo,Deng, Meng,Wang, Qingmin

supporting information, p. 977 - 981 (2014/04/03)

A bioinspired approach for the construction of the 4- aryldihydroisoquinolinone moiety via direct oxidative Csp2-Csp 3 coupling has been developed, which uses inexpensive sodium nitrite as catalyst and environmentally benign oxygen in the air as terminal oxidant.

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