Multiple arylation of alkyl aryl ketones and α,β-unsaturated carbonyl compounds via palladium catalysis
作者:Yoshito Terao、Yoko Kametani、Hiroyuki Wakui、Tetsuya Satoh、Masahiro Miura、Masakatsu Nomura
DOI:10.1016/s0040-4020(01)00555-5
日期:2001.7
to butyl) aryl ketones have been found to undergo multiple arylation on the alkyl chains accompanied by oxidative unsaturation upon treatment with excess aryl bromides in the presence of a palladium catalyst and a base. In the case of phenyl propyl ketones, for example, the arylation occurs up to five times on the α-and γ-positions as well as the ortho-position of the phenyl ring to give 1-(biphenyl-2-yl)-2
已经发现,在钯催化剂和碱的存在下,用过量的芳基溴化物处理后,烷基(乙基至丁基)芳基酮在烷基链上发生多个芳基化反应,并伴随氧化不饱和键。例如,在苯基丙基酮的情况下,芳基在苯环的α和γ位以及邻位上最多发生五次芳基化反应,生成1-(联苯-2-基)-2 ,4,4,4-四苯基-2-丁烯-1-酮与其他芳基化产物。许多α,β-不饱和羰基化合物也在α-和γ-位上复芳基化。