cyclohexanecarboxylic acid (10), both of which were prepared by the Diels-Alder reaction of 3,4-methylenedioxy - ω - nitrostyrene with butadiene and the Robinson annelation of 3,4-methyl- enedioxy - phenylpyruvic acid (9) with methyl vinyl ketone, respectively, 14a was converted into (±)Δ2-α-lycoren-7-one (22b), which has been transformed into (±)-lycorine (1) by Torssell
由八氢
菲咯啶-3-酮(8b)以从5-芳基-4-硝基
环己烯(2)和1-羟基-2-开始的两种方法制得(±)-α-Lycoran-3,5-dione(14a)。芳基-5-氧代-
环己烷甲酸(10),两者都是通过3,4-亚甲基二氧基-ω-硝基
苯乙烯与
丁二烯的Diels-Alder反应和3,4-甲基二烯二氧基-
苯基丙酮酸的Robinson酸化反应制得的。 (9)与甲基
乙烯基酮,分别14A转化为(±)Δ 2 -α-lycoren -7-酮(22B),它已被转化成(±)-lycorine(1)由Torssell