(15) (4%), and methyl (+)-7-oxo-13β-abiet-8-en-18-oate (23%) respectively. It is noteworthy that oxygenation occurs not only at the C-7 and C-11 positions but also at the C-14 position. The oxygenated products obtained in this studies could be useful intermediates for the synthesis of the oxidized diterpenoids of abietane skeleton. To exemplify this, 15 was converted to methyl suaveolate an...
用柯林斯试剂氧化甲基 (+)-13β-abiet-8-en-18-oate 产生了九种氧化产物。根据光谱和
化学数据阐明了它们的结构是甲基 (-)-1
4-羟基-7-oxoabieta-8,11,13-trien-18-oate (1% 产率), 甲基 (-)-11 ,14-dioxoabieta-8,12-dien-18-oate (1%),methyl (+)-11-oxo-13β-abiet-8-en-18-oate (18%),methyl (-)-8α ,9α-epoxy-7-oxo-13β-abietan-18-oate (2%),methyl (+)-7-oxoabieta-8,11,13-trien-18-oate (2%),methyl (+) -11,14-dihydroxy-7-oxoabieta-8,11,13-trien-18-oate (2%),methyl (+)-7