oxidation. Treatment of 11 with lithium aluminium hydride yielded hinokiol, which was oxidized to hinokione. Subsequently, hinokiol was methylated and the resulting 12-methyl ether was dehydrated to afford 12-methoxyabieta-2,8,11,13-tetraene. The tetraene was then submitted to hydroboration-oxidation to give 12-methoxyabieta-8,11,13-trien-2α-ol (15) which, on demethylation with ethanethiol and anhydrous
abieta-5,8,11,13-tetraen-3-one 用
氢化铝锂还原得到相应的醇,将其催化氢化得到 abieta-8,11,13-trien-3β-ol (7)连同其 5βH-异构体。将 7 乙酰化,然后进行 Friedel-Crafts 酰化,得到 3β-乙酰氧基-12-乙酰
松香-8,11,13-
三烯。该化合物通过 Baeyer-Villiger 氧化转化为 3β,12-diacetoxyabieta-8,11,13-triene (11)。用
氢化铝锂处理 11 产生扁柏醇,将其氧化为扁柏酮。随后,将桧醇甲基化并将所得12-甲基醚脱
水以提供12-甲氧基枞树-2,8,11,13-四烯。然后对四烯进行
硼氢化-氧化,得到 12-甲氧基
松香-8,11,13-trien-2α-ol (15),其中,用
乙硫醇和无
水氯化铝脱甲基,得到丹
酚。15 用
氯铬酸吡啶氧化,然后去甲基化,得到 2-oxoferruginol。