Synthesis of (−)-Piperitylmagnolol Featuring <i>ortho</i>-Selective Deiodination and Pd-Catalyzed Allylation
作者:Atsushi Ikoma、Narihito Ogawa、Daiki Kondo、Hiroki Kawada、Yuichi Kobayashi
DOI:10.1021/acs.orglett.6b00706
日期:2016.5.6
A 1,4-addition strategy using an enone and a copper reagent was studied for the synthesis of (−)-piperitylmagnolol. A MOM-protected biphenol copper reagent was added to BF3·OEt2-activated 4-isopropylcyclohexenone, whereas 1,4-addition of protected monophenol reagents possessing an allyl group was found to be unsuccessful. The allyl group was later attached to the p-,p′-diiodo-biphenol ring by Pd-catalyzed
研究了使用烯酮和铜试剂的1,4-加成策略,用于合成(-)-哌啶基厚朴酚。将MOM保护的双酚铜试剂添加到BF 3 ·OEt 2活化的4-异丙基环己烯酮中,而发现未成功添加1,4-具有烯丙基的保护单酚试剂。烯丙基随后通过Pd催化的与烯丙基硼酸酯的偶合而连接至p-,p′-二碘代-双酚环。上述碘化物使用新的方法,用于合成邻的脱碘-选择性ø - ,p -diiodophenols。