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dichloroacetic acid 1-phenyl-pent-4-enyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

144222-54-8

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144222-54-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 144222-54-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,4,2,2 and 2 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 144222-54:
(8*1)+(7*4)+(6*4)+(5*2)+(4*2)+(3*2)+(2*5)+(1*4)=98
98 % 10 = 8
So 144222-54-8 is a valid CAS Registry Number.

144222-54-8Relevant articles and documents

Synthesis of medium-sized lactones by the copper(I)chloride/2,2′-bipyridine-catalyzed cyclization of di- and trichloroacetates

Pirrung, Frank O. H.,Hiemstra, Henk,Speckamp, W. Nico,Kaptein, Bernard,Schoemaker, Hans E.

, p. 12415 - 12442 (1994)

Medium-sized lactones (eight- to eleven-membered rings) are efficiently formed by Cu(bpy)Cl catalyzed cyclization of various alkenyl di- and trichloroacetates at temperatures between 80 and 190°C in 1,2-dichloroethane or benzene as solvents. The mechanism of the alkene addition reaction is best understood as a chlorine atom transfer process through radical type intermediates. Exclusive endo-cyclization is observed in all cases. Ten and eleven-membered lactones are only accessible by the 'rigid chain' approach, in which an alkyne or alkene function is incorporated in the chain connecting the reaction centres, thus reducing the flexibility of the molecule.

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