Asymmetric Total Syntheses of Insulicolide A, 14-<i>O</i>-Acetylinsulicolide A, 6β,9α-Dihydroxy-14-<i>p</i>-nitrobenzoylcinnamolide, and 7α,14-Dihydroxy-6β-<i>p</i>-nitrobenzoylconfertifolin
作者:Yang Lai、Nan Zhang、Yi Zhang、Jia-Hua Chen、Zhen Yang
DOI:10.1021/acs.orglett.8b01733
日期:2018.7.20
Asymmetrictotalsyntheses of insulicolide A, 14-O-acetylinsulicolide A, 6β,9α-dihydroxy-14-p-nitrobenzoyl cinnamolide, and 7α,14-dihydroxy-6β-p-nitrobenzoylconfertifolin have been achieved for the first time. The key steps in the synthesis include: (1) an iridium-catalyzed enantioselective polyene cyclization to construct the drimane core bearing two all-carbon quaternary chiral centers at C4 and
insulicolide A的不对称全合成,14- ö -acetylinsulicolide A,6β,9α二羟基-14- p -硝基苯甲酰cinnamolide,和7α,14-二羟基- 6β- p -nitrobenzoylconfertifolin首次已经实现。合成的关键步骤包括:(1)铱催化的对映选择性多烯环化,以构建在C4和C10处带有两个全碳四级手性中心的drimane核,以及(2)苯酚环的级联臭氧分解以形成内酯。靶分子的片段。
HERBIZID WIRKSAME 3-PHENYLISOXAZOLINDERIVATE
申请人:Bayer CropScience AG
公开号:EP2900645A1
公开(公告)日:2015-08-05
CATALYSTS AND METHODS FOR POLYMER SYNTHESIS
申请人:Novomer, Inc.
公开号:US20130144033A1
公开(公告)日:2013-06-06
The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with co-catalytic activity tethered to a multidentate ligand that is coordinated to the active metal center of the complex.
SALEN COMPLEXES WITH DIANIONIC COUNTERIONS
申请人:Novomer, Inc
公开号:US20140336354A1
公开(公告)日:2014-11-13
The present invention describes metal salen complexes having dianionic counterions. Such complexes can be readily precipitated and provide an economical method for the purification and isolation of the complexes, and are useful to prepare novel polymer compositions.
CATALYTIC CARBONYLATION CATALYSTS AND METHODS
申请人:Novomer, Inc.
公开号:US20170073463A1
公开(公告)日:2017-03-16
In one aspect, the present invention provides catalysts for the carbonylation of heterocycles. The inventive catalysts feature metal-ligand complexes having cationic functional groups tethered to the ligand, wherein the tethered cationic groups are associated with anionic metal carbonyl species. The invention also provides methods of using the inventive catalysts to affect the ring opening carbonylation of epoxides.