Total syntheses of lindenane-type sesquiterpenoids: (±)-chloranthalactones A, B, F, (±)-9-hydroxy heterogorgiolide, and (±)-shizukanolide E
作者:Guizhou Yue、Li Yang、Changchun Yuan、Biao Du、Bo Liu
DOI:10.1016/j.tet.2012.09.053
日期:2012.11
Chloranthalactones A, B, F, 9-hydroxy heterogorgiolide, and shizukanolide E are a family of natural lindenane-type sesquiterpenoids isolated mainly from chloranthaceae. A general synthetic strategy was accomplished by us for the racemic total syntheses of the five natural products. The key steps included substrate-controlled Matteson epoxidation of ketone and highly diastereoselective intramolecular
TiCl4‐Et3N‐mediated condensation of ketones with methyl pyruvate afforded γ‐alkylidene butenolides via a tandem cross‐aldol addition/dehydroxylation/intramolecular lactonization process in one‐pot. The application of the methodology to the straightforward synthesis of elem‐1,3,7,8‐tetraen‐8,12‐olide, chloranthalactone A, and dehydromenthofurolactone, is demonstrated.
TiCl 4 - Et 3 N介导的酮与丙酮酸甲酯的缩合反应通过一个锅中的串联交叉羟醛加成/脱羟基/分子内内酯化过程提供了γ-亚烷基丁烯内酯。演示了该方法在直接合成elem-1,3,7,8-tetraen-8,12-内酯,氯半乳糖苷A和脱氢薄荷脑内酯中的应用。
Diverse Chemosensitizing 8,9-Secolindenane-Type Sesquiterpenoid Oligomers and Monomers from <i>Sarcandra glabra</i>
作者:Jun Chi、Shanshan Wei、Hongliang Gao、Dingqiao Xu、Lina Zhang、Lei Yang、Wenjun Xu、Jun Luo、Lingyi Kong
DOI:10.1021/acs.joc.9b00986
日期:2019.7.19
9-secolindenane (II) with active aldehyde and maleic anhydride fragments that can capture other fragments and produce oligomeric molecules. A careful phytochemical investigation of the leaves of Sarcandraglabra led to the discovery of eight novel 8,9-secolindenane-type sesquiterpenoid oligomers (sarglalactones A–H, compounds 1–8), including three unprecedented trimers (1–3), five unusual dimers (4–8)
Asymmetric Total Synthesis of Natural Lindenane Sesquiterpenoid Oligomers via a Triene as a Potential Biosynthetic Intermediate
作者:Zhengsong Huang、Ganxing Huang、Xiao Wang、Song Qin、Shaomin Fu、Bo Liu
DOI:10.1002/anie.202204303
日期:2022.7.18
A conjugated triene was evidenced as a universal synthetic and biosynthetic intermediate toward various natural lindenane oligomers under simulated physiological conditions with high stereoselectivity. The related oligomerization modes involve linear connection, head-to-head [4+2] cycloaddition, head-to-tail [4+2] cycloaddition, head-to-back [4+2] cycloaddition, and head-to-tail [6+6] cycloaddition
Sequential biomimetic elaborations, featured by CrO3-mediated oxidative lactonization, and DDQ-involved oxidative enol-lactonization, ensured the concise total synthesis of (+)-chloranthalactone F.