A New Preparation of 1,3,3-Trimethylbicyclo[2.2.2]octan-2,6-dione, a Never Isolated Intermediate in a Total Synthesis of (+)-Norpatchoulenol. Formal Total Synthesis of (±)-Iso-Norpatchoulenol
作者:Angela La Bella、Francesca Leonelli、Ilse De Salve、Luisa M. Migneco、Rinaldo Marini Bettolo
DOI:10.1002/hlca.200490191
日期:2004.8
A new preparation and the isolation and spectroscopic characterization of 1,3,3-trimethylbicyclo[2.2.2]octan-2,6-dione (3), a so far elusive key intermediate in the Liu–Ralitsch total synthesis of (+)-norpatchoulenol ((+)-1a), is described. The preparation of 3 constitutes also a formal total synthesis of (±)-iso-norpatchoulenol ((±)-1b), since 3 is correlated to an intermediate in the Monti and co-workers
1,3,3-三甲基双环[2.2.2] octan-2,6-dione(3)的一种新制备方法以及分离和光谱表征,这是迄今为止在Liu - Ralitsch(+)合成中难以捉摸的关键中间体描述了-去甲七叶烯醇((+)- 1a)。3的制备也构成了(±)-异-去甲酚((±)-1b)的正式全合成,因为3与Monti和同事的中间体有关(±)-1b。