The present paper describes a total synthesis of racemic β-chamigrene (1), a sesquiterpene with a spiro[5.5]undecane carbon framework. Compared with previously reported β-chamigrene syntheses, we were able to reduce the total number of reaction steps, which also resulted in a significant improvement of the overall yield. The commercially available ketone 6-methylhept-5-en-2-one was transformed by known
本论文描述了外消旋 β-chamigrene (1) 的全合成,这是一种具有螺 [5.5]
十一烷碳骨架的
倍半萜。与之前报道的 β-chamigrene 合成相比,我们能够减少反应步骤的总数,这也显着提高了总产率。市售的酮 6-methylhept-5-en-2-one 通过已知的简单程序转化为 3,3-二甲基-2-亚甲基
环己酮。这通过狄尔斯-阿尔德反应与
异戊二烯反应得到螺酮。该化合物的烯化反应得到目标分子。