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56421-81-9

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56421-81-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56421-81-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,4,2 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 56421-81:
(7*5)+(6*6)+(5*4)+(4*2)+(3*1)+(2*8)+(1*1)=119
119 % 10 = 9
So 56421-81-9 is a valid CAS Registry Number.

56421-81-9Downstream Products

56421-81-9Relevant articles and documents

2-Pyridyl and 3-pyridylzinc bromides: direct preparation and coupling reaction

Kim, Seung-Hoi,Rieke, Reuben D.

scheme or table, p. 3135 - 3146 (2010/06/13)

A facile synthetic approach to the direct preparation of 2-pyridyl and 3-pyridylzinc bromides has been demonstrated using Rieke zinc with 2-bromopyridine and 3-bromopyridine, respectively. A variety of different electrophiles have been coupled with the resulting organozinc reagents to give the corresponding cross-coupling products in moderate to good yields.

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