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210303-87-0

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210303-87-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 210303-87-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,0,3,0 and 3 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 210303-87:
(8*2)+(7*1)+(6*0)+(5*3)+(4*0)+(3*3)+(2*8)+(1*7)=70
70 % 10 = 0
So 210303-87-0 is a valid CAS Registry Number.

210303-87-0Downstream Products

210303-87-0Relevant articles and documents

Polyaza[n](1,4)naphthalenophanes and polyaza[n](9,10)anthracenophanes

Burguete, M.Isabel,Escuder, Beatriu,García-Espa?a, Enrique,Luis, Santiago V,Miravet, Juan F

, p. 2839 - 2846 (2007/10/03)

A series of polyaza[n](1,4)naphthalenophanes and polyaza[n](9,10)anthracenophanes have been prepared by using the Fukuyama's protecting group (2- or 4-nitrophenyl sulfonyl) in a one-pot cyclization-deprotection reaction. Global yields for the purified products are comparable with those obtained for other polyazacyclophanes using the tosyl group as the amine protecting group. Their structural study has been carried-out by NMR showing a high rigidity for the smaller cycles and a more dynamic behaviour for the largest member of the series. The free energy barrier for the rotational equilibrium for compound 25 is about 3kcal/mol lower than that calculated for analogous N-tosylated macrocycles.

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