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81356-73-2

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81356-73-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81356-73-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,3,5 and 6 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 81356-73:
(7*8)+(6*1)+(5*3)+(4*5)+(3*6)+(2*7)+(1*3)=132
132 % 10 = 2
So 81356-73-2 is a valid CAS Registry Number.

81356-73-2Relevant articles and documents

Metal-Halogen Exchange Reactions of Mono- and Poly-halogenoimidazoles

Iddon, Brian,Lim, Bee Lan

, p. 735 - 739 (2007/10/02)

4(5)-Bromoimidazole gave a mixture of 4- and 5-bromo-1-methylimidazole on treatment with 1 or 2 mol equiv. of n-butyl-lithium in ether or THF under various reaction conditions followed by addition of dimethyl sulphate. 5-Iodo and 2,4,5-tribromo-1-methylim

Metallation and Metal-Halogen Exchange Reactions of Imidazoles

Iddon, Brian,Lim, Bee Lan

, p. 1095 - 1097 (2007/10/02)

Some reactions (reagents in parentheses) are reported of 1-ethoxymethyl-2-phenylthioimidazol-5-yl-lithium 2S2>, 1-ethoxymethyl-5-methylthio-2-phenylthioimidazol-4-yl-lithium (Me2S2, HCONMe2, CO2), 4,5-dibromo-1-ethoxymethylimid

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