Biarylmethane and Fused Heterocyclic Arene Synthesis via in Situ Generated <i>o</i>- and/or <i>p</i>-Naphthoquinone Methides
作者:Yoshinari Sawama、Takahiro Kawajiri、Shota Asai、Naoki Yasukawa、Yuko Shishido、Yasunari Monguchi、Hironao Sajiki
DOI:10.1021/acs.joc.5b00434
日期:2015.6.5
o- and/or p-naphthoquinone methides (NQMs) can be selectively prepared by the ring opening of 1-(siloxymethyl)-1,4-epoxy-1,4-dihydronaphthalene derivatives based on a substituent effect at the 4 position of the substrates. The 4-alkyl- or silyl-substituted 1-(siloxymethyl)-1,4-epoxy-1,4-dihydronaphthalene was transformed to o-NQM (1-naphthoquinone-2-methide), which underwent Friedel–Crafts 1,4-addition
邻-和/或对-萘醌甲基化物(NQMs)可通过在1-氨基甲氧基-1,4-甲氧基-1,4-环氧-1,4-二氢萘衍生物的开环作用下的1-(甲硅烷氧基甲基)-1,4-环氧-1,4-二氢萘衍生物的开环来选择性地制备。基材。将4-烷基或甲硅烷基取代的1-(甲硅烷氧基甲基)-1,4-环氧-1,4-二氢萘转化为邻-NQM(1-萘醌-2-甲基),然后进行弗里德尔-克拉夫特工艺1,4 -α,β-不饱和羰基部分的加成得到2-苄基-1-萘酚,作为联芳基甲烷,和[4 + 2]-环加成与二烯亲和剂,得到稠合的杂环芳烃。同时,可通过Friedel-Crafts 1,6-加成p的方法将4-未取代的1-(甲硅烷氧基甲基)-1,4-环氧-1,4-二氢萘转化为相应的4-苄基-1-萘酚。-NQM(1-萘醌-4-甲基化物)是通过1,4-环氧部分的位点选择性开环生成的。此外,将4-(甲硅烷氧基甲基)-(1,4-双(甲硅烷氧基甲基))-1