作者:Hidehisa Kawashima、Masahiro Sakai、Yuki Kaneko、Yuichi Kobayashi
DOI:10.1016/j.tet.2015.02.092
日期:2015.4
product afforded the 4-(CH2C(Me))-substituted 2-cyclohexenone. BF3·OEt2-assisted 1,4-addition of the enone with (4-MeOC6H4)2Cu(MgBr)·MgBr2 furnished the ketone, which is the key intermediate for the synthesis of cyclobakuchiols A and C. Second, the allylic picolinate with CMe2(OTES) and 4-MeOC6H4 groups at 3 and 4 positions of the cyclohexane ring was synthesized through 1,4-addition of (4-MeOC6H4)2Cu(MgBr)·MgBr2
描述了两个结果。首先,将奎宁酸转化为2-环己烯-1,4-二醇的单乙酸酯。Ni催化的CH 2 C(Me)MgBr / ZnCl 2 / TMEDA的单乙酸酯的烯丙基取代,然后氧化所得的S N 2型产物,得到4-(CH 2 C(Me))-取代的2-环己烯酮。BF 3 ·OET 2 -assisted 1,4-加成烯酮与(4-MeOC 6 H ^ 4)2的Cu(MgBr)·MgBr 2提供的酮,这是cyclobakuchiols A和C的合成中的关键中间体第二,具有CMe 2(OTES)和4-MeOC 6的烯丙基吡啶甲酸通过将(4-MeOC 6 H 4)2 Cu(MgBr)·MgBr 2加到4-(CMe 2(OTES))-2-中,将1,4-加成合成在环己烷环的3和4位上的H 4基团。环己烯酮。将该吡啶甲酸酯进行烯丙基取代,然后脱保护,得到环爆酚C。此外,将环爆酚C的甲基醚转化为环爆酚A。