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118678-22-1

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118678-22-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 118678-22-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,6,7 and 8 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 118678-22:
(8*1)+(7*1)+(6*8)+(5*6)+(4*7)+(3*8)+(2*2)+(1*2)=151
151 % 10 = 1
So 118678-22-1 is a valid CAS Registry Number.

118678-22-1Relevant articles and documents

Synthesis of Enamides

Brettle, Roger,Mosedale, Alan J.

, p. 2185 - 2196 (2007/10/02)

(Z)-3-Arylprop-2-enoic acids can be converted by the Curtius procedure, through the acyl azides, into (Z)-2-arylethenyl isocyanates, which with methanol give methyl (Z)-N-(2-arylethenyl)carbamates.Acylation of the (Z)-enecarbamates, through their anions, leads to methyl (Z)-N-acyl-N-(2-arylethenyl)carbamates, which on treatment with lithium iodide in boiling N,N-dimethylformamide or acetonitrile undergo demethoxycarbonylation to give (Z)-enamides.The stereospecific route to enamides can also be used in the E-series.Treatment of (Z)- or (E)-2-arylethenyl isocyanates with trifluoroacetic acid gives (E)-N-(2-arylethenyl)trifluoroacetamides,the anions of which, with acylating agents, give (E)-enamides directly.

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