Total Synthesis of Racemic Ligularone and Isoligularone.
作者:Takeshi KOIKE、Naoki TAKEUCHI、Takashi OHTA、Seisho TOBINAGA
DOI:10.1248/cpb.47.897
日期:——
Racemic ligularone (2) and isoligulatone (18) were synthesized from the cis-4aβ, 5, 6, 7, 8, 8a-hexahydro-8β, 8aβ-dimethylnapthalen-1, 3(2H, 4H)-dione (11) by furannulation reaction with diethylprop-2-ynylsulphonium bromide, prepared from diethyl sulfide and propargyl bromide.
通过与二乙基丙-2-炔基溴化铵(由二乙基硫醚和丙炔基溴化物制备)发生呋喃化反应,从顺式-4aβ, 5, 6, 7, 8, 8a-六氢-8β, 8aβ-二甲基萘-1, 3(2H, 4H)-二酮(11)合成了外消旋的里古拉酮(2)和里古拉酮(18)。