作者:Thomas P. Brady、Sun Hee Kim、Ke Wen、Charles Kim、Emmanuel A. Theodorakis
DOI:10.1002/chem.200500513
日期:2005.12.9
A stereoselective synthesis of (+)-norrisolide is presented. This natural product belongs to a family of marine spongiane diterpenes the structure of which is characterized by a fused gamma-lactone-gamma-lactol ring system attached to a bicyclic hydrophobic core. Our studies led to the development of a expedient synthesis of such gamma-lactone-gamma-lactol motifs based on ring expansion of a fused
Total Synthesis of (−)-Chromodorolide B By a Computationally-Guided Radical Addition/Cyclization/Fragmentation Cascade
作者:Daniel J. Tao、Yuriy Slutskyy、Mikko Muuronen、Alexander Le、Philipp Kohler、Larry E. Overman
DOI:10.1021/jacs.7b13799
日期:2018.2.28
The first total synthesis of a chromodorolide marine diterpenoid is described. The core of the diterpenoid is constructed by a bimolecular radical addition/cyclization/fragmentation cascade that unites two complex fragments and forms two C-C bonds and four contiguous stereogenic centers of (-)-chromodorolide B in a single step. This coupling step is initiated by visible-light photocatalytic fragmentation
描述了 chromodorolide 海洋二萜的首次全合成。二萜的核心是通过双分子自由基加成/环化/断裂级联反应构建的,该级联反应将两个复杂片段结合在一起,并在一个步骤中形成两个 CC 键和 (-)-chromodorolide B 的四个连续立体中心。该偶联步骤由氧化还原活性酯的可见光光催化裂解引发,可在铱或不太贵的富电子二氰基苯光催化剂存在下完成,并使用等摩尔量的两个加成物。计算研究指导了合成的这一核心步骤的发展,并提供了对观察到的立体选择性起源的深入了解。
Total Synthesis of (−)-Chromodorolide B
作者:Daniel J. Tao、Yuriy Slutskyy、Larry E. Overman
DOI:10.1021/jacs.6b00541
日期:2016.2.24
The first totalsynthesis of a chromodorolide diterpenoid is described. The synthesis features a bimolecular radical addition/cyclization/fragmentation cascade that unites butenolide and trans-hydrindane fragments while fashioning two C-C bonds and stereoselectively forming three of the ten contiguous stereocenters of chromodorolide B.
描述了 chromodorolide 二萜的首次全合成。该合成采用双分子自由基加成/环化/断裂级联反应,将丁烯内酯和反式氢化茚片段结合在一起,同时形成两个 CC 键并立体选择性地形成 chromodorolide B 的十个连续立体中心中的三个。
Diastereoselective routes towards the austrodorane skeleton based on pinacol rearrangement: synthesis of (+)-austrodoral and (+)-austrodoric acid
Abstract Efficient routes towards the austrodorane skeleton from the labdane diterpene (−)-sclareol (22) are described. The processes, based on pinacol rearrangement, take place with complete diastereoselectivity. Utilizing these, the marine nor-sesquiterpenes (+)-austrodoral (1) and (+)-austrodoric acid (2) have been prepared from 22. Ketone 19, a key intermediate in the synthesis of rearranged cytotoxic
Synthesis of 17-Deacetoxyl Chromodorolide B Based on a Gold-Catalyzed Alkoxycyclization Reaction
作者:Chen Li、Tianfei Quan、Yibin Xue、Yuhui Cao、Si-Cong Chen、Tuoping Luo
DOI:10.1021/acs.orglett.0c00247
日期:2020.2.21
A novel strategy to construct the highly oxidized 3-oxabicyclo[3.3.0]octane skeleton was developed via a gold-catalyzed cascade cyclization with 2,7-dioxabicyclo[3.2.0]hept-3-ene as the substrate. We utilized this methodology as the key reaction to synthesize 17-deacetoxyl chromodorolide B.