First total synthesis of (+)-apotrisporin E and (+)-apotrientriols A–B: a cyclization approach to apocarotenoids
摘要:
首次完成了天然类胡萝卜素 (+)-apotrisporin E (1) 和 (+)-apotrientriols A 和 B (2â3) 的全合成。其结构、相对立体化学和绝对构型的确定均已得到证实。这是一种快速、简便地获得该天然产物家族的方法,其关键步骤是非对映选择性环化和 HWE 烯化以连接二烯侧链。这项工作还为合成其他类胡萝卜素(如三孢子醇和三孢子酸)打开了大门。
First total synthesis of (+)-apotrisporin E and (+)-apotrientriols A–B: a cyclization approach to apocarotenoids
摘要:
首次完成了天然类胡萝卜素 (+)-apotrisporin E (1) 和 (+)-apotrientriols A 和 B (2â3) 的全合成。其结构、相对立体化学和绝对构型的确定均已得到证实。这是一种快速、简便地获得该天然产物家族的方法,其关键步骤是非对映选择性环化和 HWE 烯化以连接二烯侧链。这项工作还为合成其他类胡萝卜素(如三孢子醇和三孢子酸)打开了大门。
Combining the Power of Ti<sup>III</sup>-Mediated Processes for Easy Access to Hydroxylated Polycyclic Terpenoids: Synthesis of Sesterstatin 1 and C-D Rings of Aspergilloxide
作者:Tania Jiménez、Sara P. Morcillo、Ana Martín-Lasanta、Daniel Collado-Sanz、Diego J. Cárdenas、Andreas Gansäuer、José Justicia、Juan M. Cuerva
DOI:10.1002/chem.201201534
日期:2012.10.1
A straightforward access to polyhydroxylated terpenoids based on two key titanocene(III)‐mediated reactions is presented: the “head‐to‐tail” Barbier‐type addition of prenyl chlorides to α,β‐unsaturated aldehydes, which allows the introduction of hydroxy groups at desirable positions of the acyclic precursor, and the subsequent bioinspired radical cyclisation. This methodology has been also used in