PROCESSES FOR CONVERSION OF BIOLOGICALLY DERIVED MEVALONIC ACID
申请人:Visolis, Inc.
公开号:US20160145227A1
公开(公告)日:2016-05-26
The invention relates to a process comprising reacting mevalonic acid, or a solution comprising mevalonic acid, to yield a first product or first product mixture, optionally in the presence of a solid catalyst and/or at elevated temperature and/or pressure. The invention further relates to a process comprising: (a) providing a microbial organism that expresses a biosynthetic mevalonic acid pathway; (b) growing the microbial organism in fermentation medium comprising suitable carbon substrates, whereby biobased mevalonic acid is produced; and (c) reacting said biobased mevalonic acid to yield a first product or first product mixture.
Application of Cp<sub>2</sub>TiCl-Promoted Radical-Induced Cyclization: An Expeditious Access to [<i>a</i>]-Annelated Indoles
作者:Hina P. A. Khan、Tushar Kanti Chakraborty
DOI:10.1021/acs.joc.0c00817
日期:2020.6.19
An efficient and novel route for assembling pyrrolo/piperido[1,2-a]indoles is portrayed involving a radical-mediated reductive epoxide opening reaction of N-tethered epoxy-indoles that trigger facile intramolecular cyclization followed by an oxidative quenching step. Capitalizing on the operational simplicity of the method involving just two steps and use of an efficient C–C bond-forming reaction,
描绘了一种高效且新颖的组装吡咯并/哌啶并[1,2- a ]吲哚的方法,该方法涉及自由基介导的N-束缚的环氧吲哚的还原性环氧开环反应,该反应触发容易的分子内环化,然后进行氧化猝灭步骤。利用仅涉及两个步骤的方法的操作简便性,并利用有效的C–C键形成反应,该基于自由基的协议使具有重要功能和结构多样性的一类重要的N稠合吲哚衍生物得以模块化组装。
Process for total synthesis of pladienolide B and pladienolide D
申请人:Kanada Mikie Regina
公开号:US20080021226A1
公开(公告)日:2008-01-24
[Problems to be Solved]
To provide an effective process for total synthesis of pladienolide B and pladienolide D having excellent anti-tumor activity and to provide useful intermediates in the above-described process.
[Measure for Solving the Problem]
A process for producing a compound represented by Formula (11):
wherein P
1
, P
7
, P
8
, P
9
and R
1
are the same as defined below, characterized by including reacting a compound represented by Formula (12):
wherein P
7
means a hydrogen atom or a protecting group for hydroxy group; R
1
means a hydrogen atom or a hydroxy group, with a compound represented by Formula (13):
wherein P
1
means a hydrogen atom or a protecting group for hydroxy group; P
8
means a hydrogen atom, an acetyl group or a protecting group for hydroxy group; P
9
means a hydrogen atom or a protecting group for hydroxy group; or P
8
and P
9
may form together a group represented by a formula:
wherein R
5
means a phenyl group which may have a substituent, in the presence of a catalyst.
Palladium-Catalyzed Long-Range Deconjugative Isomerization of Highly Substituted α,β-Unsaturated Carbonyl Compounds
作者:Luqing Lin、Ciro Romano、Clément Mazet
DOI:10.1021/jacs.6b06390
日期:2016.8.17
long-range deconjugative isomerization of a broad range of α,β-unsaturated amides, esters, and ketones by an in situ generated palladium hydride catalyst is described. This redox-economical process is triggered by a hydrometalation event and is thermodynamically driven by the refunctionalization of a primary or a secondary alcohol into an aldehyde or a ketone. Di-, tri-, and tetrasubstituted carbon-carbon
There provided a 12-membered-ring macrolactam derivative having antitumor activity: A compound represented by Formula (1) or a salt thereof. In this Formula, R
1
is a hydrogen atom, a C
1-6
alkyl group, a C
1-6
alkylcarbonyl group or a C
6-14
arylcarbonyl group; R
2
is a hydrogen atom or a C
1-6
alkyl group; R
3
is a hydrogen atom or a hydroxyl group; R
4
is a hydrogen atom or a hydroxyl group; R
5
is a hydrogen atom or a C
1-6
alkyl group; R
6
is a hydrogen atom or a hydroxyl group; and R
7
is an acetyl group or the like.