1-(2,4-dihydroxy-6-methylphenyl)-3-methyl-1-butanone 、
异戊烯醇 在
boron trifluoride ether 、
氮 、
乙醚 、
碳酸氢钠 、 Brine 、
Sodium sulfate-III 、 crude product 、 silica gel 作用下,
以
1,4-二氧六环 为溶剂,
反应 5.0h,
以gave, in the order of elution, 246 mg of {3,5-bis(3-methyl-2-butenyl)-2-hydroxy-6-methyl-4-(3-methyl-2-butenyloxy)phenyl}(2-methylpropyl) ketone (51) as a light yellow viscous oil and 95 mg of {2,4-dihydroxy-6-methyl-3-(3-methyl-2-butenyl)phenyl}(2-methylpropyl) ketone (49) as a light yellow fine needles的产率得到{3,5-bis(3-methyl-2-butenyl)-2-hydroxy-6-methyl-4-(3-methyl-2-butenyloxy)phenyl} (2-methylpropyl) ketone