Formation of<i>meta</i>-Substituted Phenols by Transition Metal-Free Aromatization: Use of 2-Bromocyclohex-2-en-1-ones
作者:Guojun Yu、Derrick L. J. Clive
DOI:10.1021/acs.joc.6b01653
日期:2016.9.16
or other organometallic reagents to 2-halocyclohex-2-en-1-ones bearing an alkyl or aryl group at C-5, followed by mild acid treatment and exposure to 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) at room temperature, generates meta-substituted phenols in which the newly introduced meta substituent originates from the Grignard reagent. The range of effective organometallic reagents includes alkyl, allyl,
将格利雅(Grignard)或其他有机金属试剂加到C-5上带有烷基或芳基的2-卤代环己-2-烯-1-酮中,然后进行弱酸处理并暴露于1,8-二氮杂双环[5.4.0]十一烷基-室温下的7-烯(DBU)生成间位取代的苯酚,其中新引入的间位取代基源自格氏试剂。有效的有机金属试剂的范围包括烷基,烯丙基,炔基,芳基和杂芳基化合物,包括具有氟取代基的那些。最初的卤代环己烯酮可以在C-6处质子化,并在添加格利雅(Grignard)之前与碳,氟或硫亲电试剂反应,从而生成高度取代的苯酚。