作者:Takashi Matsumoto、Sachihiko Imai、Takashi Yoshinari、Kazuaki Tsuruta
DOI:10.1246/bcsj.60.2401
日期:1987.7
elucidate the absolute configuration of C-15 in natural ar-abietatrien-12,16-oxide, (15R)-12,16-epoxy-8,11,13-abietatriene (1a) and its (15S)-epimer (1b) have been synthesized. Treatment of (15R)-8,11,13-abietatriene-12,16-diol with a mixture of chloromethyl methyl ether, dicyclohexano-18-crown-6, and potassium carbonate afforded 1a as a minor product and (15R)-12-methoxymethyl ether as a major product
为了阐明天然 ar-abietatrien-12,16-oxide 中 C-15 的绝对构型,(15R)-12,16-epoxy-8,11,13-abietatriene (1a) 及其 (15S)-差向异构体(1b) 已合成。(15R)-8,11,13-松香三烯-12,16-二醇用氯甲基甲醚、二环己基-18-冠-6和碳酸钾的混合物处理得到1a作为次要产物和(15R)-12 -甲氧基甲基醚为主要产品。后者进一步转化为1a。(15S)-8,11,13-松香三烯-12,16-二醇的类似处理得到1b。12,16-epoxy-8,11,13,15-abietatetraene、12,16-epoxy-8,11,13,15-abietatetraen-19-oate (5) 和 12,16-epoxy 甲酯的催化氢化-8,11,13,15-abietatetraen-18-oate (7) 得到相应的