The synthesis and structural determination of two new diterpenylhydroquinones: 2β-acetoxy-15-phenyl-(22,25-dihydroxy)-ent-labda-8(17),13(E)-diene(1) and 2β-hydroxy-15-phenyl-(22,25-dihydroxy)-ent-labda-8(17),13(E)-dieneis reported (2). These compounds were obtained by coupling via Electrophilic Aromatic Substitution (EAS) of 1,4-hydroquinone with primary or tertiary allyl alcohol derivatives of the natural ent-labdanes 3 and 4. With this new method, the best results were observed when mixtures of the primary alcohol derivatives 5-6 (26% yield of compound 1) and diol derivatives 9-10 (28% yield of compound 2) were used.
两种新二萜
对苯二酚2β-乙酰氧基-15-苯基-(22,25-二羟基)-ent-labda-8(17),13(E)-diene(1)和2β-羟基-15的合成及结构测定报道了-苯基-(22,25-二羟基)-ent-labda-8(17),13(E)-二烯(2)。这些化合物是通过 1,4-
对苯二酚的亲电芳香取代 (EAS) 与天然对映拉丹烷 3 和 4 的伯或叔
烯丙醇衍
生物偶联而获得。通过这种新方法,当使用伯醇衍
生物5-6(化合物1的产率26%)和二醇衍
生物9-10(化合物2的产率28%)。