Lycoperine A was synthesized through a highly convergent route in which a double alkylation of 2,6-dicyano-N-benzylpiperidine with the octahydroquinoline moiety gave the lycoperine skeleton. The octahydroquinoline was prepared by a desymmetrization reaction of 5-methylcyclohexane-1,3-dione. Hydrolysis, reductive amination, and cyclization gave lycoperine A in 13 steps and 3% overall yield. The absolute configuration of lycoperine A was assigned as 6R,6'R,8R,8'R,13S,17R.
Lycoperine A was synthesized through a highly convergent route in which a double alkylation of 2,6-dicyano-N-benzylpiperidine with the octahydroquinoline moiety gave the lycoperine skeleton. The octahydroquinoline was prepared by a desymmetrization reaction of 5-methylcyclohexane-1,3-dione. Hydrolysis, reductive amination, and cyclization gave lycoperine A in 13 steps and 3% overall yield. The absolute configuration of lycoperine A was assigned as 6R,6'R,8R,8'R,13S,17R.
A novelclass of C38N4Lycopodium alkaloid, hupercumine A (1), consisting of two octahydroquinolines, a decahydroquinoline, and a piperidine, and a new C27N3-type alkaloid, hupercumine B (2), were isolated from Huperzia cunninghamioides (Hayata) Holub. The structures and absolute configurations of 1 and 2 were elucidated on the basis of spectroscopic data, chemical means, and biogenetic point of view
从石杉属植物中分离出新型的C 38 N 4石蒜生物碱石杉碱A(1),由两个八氢喹啉,十氢喹啉和哌啶组成,以及新的C 27 N 3型生物碱石杉碱B(2)。cunninghamioides(早aya)Holub。根据光谱数据,化学方法和生物遗传学角度阐明了1和2的结构和绝对构型。石杉碱甲(1)和乙(2)显示出对乙酰胆碱酯酶的中等抑制活性。