alkynyllithium reagents followed by (E)-selective reduction, undergo successive thermal 4π and 6π electrocyclisations to give substituted 3,4-dihydro-1(2H)-naphthalenones. An analogous sequence gave 3,4,-dihydro-1(2H)-anthracenone from naphtho[b]cyclobuten-1(2H)-one.
由
苯并环丁烯酮通过添加烯基格利雅试剂或添加炔基
锂试剂,然后经(E)选择性还原而制得的1-烯基
苯并环丁烯醇,经过连续的4π和6π热电环化反应生成取代的3,4-二氢-1(2 H) -
萘酮。类似的序列从
萘并[b]
环丁烯-1(2 H)-1得到3,4,-二氢-1(2 H)-
蒽酮。