Dendropanoxide (1) was synthesized by the reaction of 3β,4β-epoxyfriedelane (19) with boron trifluoride etherate in ether at −10 °C. In the rearrangement reaction, 4α-fluorofriedelan-3β-ol (20), D : B-friedo-olean-5(10)-en-3β-ol (21), β-amyrin (22), and D : B-friedo-olean-5-en-3β-ol (23) were also produced.
Dendropanoxide (1) 是通过 3β,4β-epoxyfriedelane (19) 与
三氟化硼醚合物在醚中在 -10 °C 下反应合成的。在重排反应中,4α-fluorofriedelan-3β-ol (20), D : B-friedo-olean-5(10)-en-3β-ol (21), β-amyrin (22), and D : B-还生产了 Friedo-olean-5-en-3β-ol (23)。