The reaction of benzenediazonium carboxylate with chloroform in refluxing tetrahydrofuran afforded 5,5,5-trichloropentyl phenyl ether in 61% yield along with benzoic acid (7%). When dichloroacetonitrile was used as a reactant, 5,5-dichloro-5-cyanopentyl phenyl ether was obtained in 65% yield. Reactive benzyne derived from diazonium carboxylate initially reacted with THF to give a dipole intermediate
Synthesis of ω-chlorinated alkyl phenyl ethers by tandem reaction of arynes with cyclicethers and active methines was achieved. Reaction of benzenediazonium 2-carboxylate with tetrahydropyran or t...