Regio- and stereospecific construction of vicinal quaternary carbons: total synthesis of (±)-albene
作者:A Srikrishna
DOI:10.1016/0031-9422(95)00592-u
日期:1995.12
A regiospecific and stereoselective total synthesis of the trisnorsesquiternene (±)-albene, via a prochiral precursor is described. The ortho ester Claisen rearrangement of the allyl alcohol, obtained in two regiospecific reactions from a Diels-Alder adduct, followed by hydrolysis of the resultant ester furnished an ene acid in a highly stereoselective manner. Anhydrous copper sulphate catalysed intramolecular
描述了通过前手性前体对 trisnorsesquiternene (±)-albene 进行区域特异性和立体选择性全合成。烯丙醇的原酸酯克莱森重排,在两个区域特异性反应中从狄尔斯-阿尔德加合物获得,然后水解所得酯,以高度立体选择性的方式提供烯酸。无水硫酸铜催化由烯酸衍生的重氮酮的分子内环丙烷化反应,生成环丙基酮。该环丙基酮的区域特异性还原裂解产生前手性酮。最后,由后者酮衍生的甲苯磺酰腙的夏皮罗反应提供 (±)-albene。