Rapid Synthesis of Taxifolione and Taxifolial D, Two Metabolites from the Marine Alga Caulerpa taxifolia
作者:Fabien Fecourt、Cedric Carlier、Patrick Pale
DOI:10.2174/157017809787003179
日期:2009.1.1
The synthesis of two natural products - Taxifolione and Taxifolial D – isolated from the marine alga Caulerpa taxifolia invading the Mediterranean Sea was performed. Coupling reactions allowed for a rapid synthesis. The surprising Z configuration of Taxifolial D was confirmed after synthesis and comparison of each synthetic stereoisomer.
我们合成了从入侵地中海的海洋藻类 Caulerpa taxifolia 中分离出来的两种天然产品--Taxifolione 和 Taxifolial D。耦合反应实现了快速合成。经过合成和比较每种合成立体异构体,证实了 Taxifolial D 令人惊讶的 Z 构型。
Tandem [4 + 2]/[2 + 2] cycloaddition of <i>o</i>-carboryne with enynes: facile construction of carborane-fused tricyclics
作者:Jie Zhang、Zuowei Xie
DOI:10.1039/d0sc07047e
日期:——
for the synthesis of a variety of carborane-functionalized molecules. With 1-Li-2-OTf-o-C2B10H10 as the precursor, o-carboryne undergoes an efficient [4 + 2] cycloaddition with various conjugated enynes, followed by a subsequent [2 + 2] cycloaddition at room temperature, generating a series of carborane-fused tricyclo[6.4.0.02,7]dodeca-2,12-dienes in moderate to high isolated yields. This reaction is
邻碳炔(1,2-脱氢邻碳硼烷)是一种非常有用的合成子,可用于合成各种碳硼烷官能化分子。以 1-Li-2-OTf- o -C 2 B 10 H 10为前驱体,邻碳硼炔与各种共轭烯炔进行有效的 [4 + 2] 环加成,随后在室温下进行 [2 + 2] 环加成温度下,产生一系列碳硼烷稠合的三环[6.4.0.0 2,7 ]十二-2,12-二烯,分离产率中等至较高。该反应与许多官能团相容,底物范围广泛。涉及反应性碳硼烷稠合 1,2-环己二烯中间体,该结果得到了实验结果和 DFT 计算的支持。该协议为构建复杂的碳硼烷官能化三环化合物提供了一种便捷的策略。
ANTIBACTERIAL AGENTS
申请人:Moser Heinz E.
公开号:US20100190766A1
公开(公告)日:2010-07-29
Antibacterial compounds of formula (I) are provided:
as well as stereoisomers, pharmaceutically acceptable salts, esters, and prodrugs thereof; pharmaceutical compositions comprising such compounds; methods of treating bacterial infections by the administration of such compounds; and processes for the preparation of such compounds.
Widely Applicable Pd-Catalyzedtrans-Selective Monoalkylation of Unactivated 1,1-Dichloro-1-alkenes and Pd-Catalyzed Second Substitution for the Selective Synthesis ofE orZ Trisubstituted Alkenes