Stereoselective Synthesis of (+)-Goniodiol, (+)-Goniotriol, (-)-Goniofupyrone, and (+)-Altholactone Using a Catalytic Asymmetric Hetero-Diels-Alder/Allylboration Approach
作者:Annaïck Favre、François Carreaux、Michael Deligny、Bertrand Carboni
DOI:10.1002/ejoc.200800535
日期:2008.10
The stereoselective total synthesis of several members of the styryllactone family was achieved efficiently from common intermediate 8, prepared by a catalytic asymmetric inverse-electron-demand hetero-Diels–Alder/allylboration sequence. The transformation of 8 into α,β-unsaturated lactone led to the preparation of (+)-goniodiol (1) in a reduced number of steps. The epoxidation reaction was used to
苯乙烯内酯家族的几个成员的立体选择性全合成是从普通中间体 8 有效地实现的,中间体 8 通过催化不对称逆电子需求异质狄尔斯-阿尔德/烯丙基硼化序列制备。将 8 转化为 α,β-不饱和内酯导致以减少的步骤数制备 (+)-goniodiol (1)。环氧化反应用于在 8 的内酯部分产生剩余的立体中心,然后将这些中间体加工成 (+)-goniotriol (2)、(-)-goniofupyrone (3) 和 (+)-altholactone ( 4) 通过异构化或环化步骤。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)