Abstract
The reaction of equimolar amounts of ketones or ketone trimethylsilylenol ethers with organyltellurium trichlorides in boiling benzene produces α-(dichloroorganyltelluro) ketones. The yields are good in the reaction of ketones and ketone silylenol ethers with (p-methoxyphenyl)tellurium trichloride; however, the reaction with aliphatic tellurium trichlorides gives good results only with ketone silyl enol ethers; reaction with ketones gives low yields of the α-(dichloroorganyltelluro) ketones. α-[Dichloro(p-methoxyphenyl)-telluro]acetophenone and α-[dichloro(p-methoxyphenyl)telluro]pinacolone afford the corresponding α-chloroketone in good yield on pyrolysis. Under similar conditions, the α-[dichloro(p-methoxyphenyl)telluro]-cycloalkanones give low yields of the α-chloro ketones. Reaction of the α-(dichloroorganyltelluro) ketones with halogens (Cl 2 , Br 2 ) gives the corresponding α-halo ketone even in the case of the cycloalkanones
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