epoxy-pyronene from δ-pyronene has been realized using metachloroperbenzoïc acid. The isomerization of this epoxydic compound with Lewis and protonic acids and on active alumina has been studied leading to cyclocitrals. Ionones are obtained from epoxy-pyronene by homologation with various C3 units, in the presence of paratoluenesulfonic acid in order to obtain β-cyclocitral in situ. New terpenic compounds with
使用间
氯过
苯甲酸可实现从δ-中选择性地选择环氧-。已经研究了这种环氧化合物与
路易斯酸和质子酸以及在活性氧化铝上的异构化,生成环
柠檬酸酯。为了在原位获得β-环
柠檬醛,在
对甲苯磺酸的存在下,通过与各种C 3单元的同系物从环氧-得到离子基。通过还原然后同源化,从环氧epoxy得到了具有环香叶基骨架的新的萜烯化合物。