Diastereoselective Synthesis of Pyrrolidines Using a Nitrone/Cyclopropane Cycloaddition: Synthesis of the Tetracyclic Core of Nakadomarin A
摘要:
The synthesis of the tetracyclic core of nakadomarin A is described. The core contains all the heterocycles and the required stereocenters found in the natural product and provides a promising route to the target itself. The strategy utilizes a general, diastereoselective pyrrolidine synthesis that proceeds via a homo 3+2 dipolar cycloaddition. The scope of this methodology is also described.
[EN] HETEROARYL COMPOUNDS USEFUL AS INHIBITORS OF SUMO ACTIVATING ENZYME<br/>[FR] COMPOSÉS HÉTÉROARYLE UTILES EN TANT QU'INHIBITEURS DE L'ENZYME D'ACTIVATION SUMO
申请人:DUFFEY MATTHEW O
公开号:WO2016004136A1
公开(公告)日:2016-01-07
Disclosed are chemical entities which are compounds of formula (I); or pharmaceutically acceptable salts thereof; wherein Y, Ra, Ra', Rb, Rc, X1, X2, X3, Rd, Z1, and Z2 have the values described herein and stereochemical configurations depicted at asterisked positions indicate absolute stereochemistry. Chemical entities according to the disclosure can be useful as inhibitors of Sumo Activating Enzyme (SAE). Further provided are pharmaceutical compositions comprising a compound of the disclosure and methods of using the compositions in the treatment of proliferative, inflammatory, cardiovascular, and neurodegenerative diseases or disorders.
The totalsynthesis of (+)-nakadomarin A is described. A three-component cycloaddition of a hydroxylamine, aldehyde, and cyclopropane to form a highly functionalized tetrahydro-1,2-oxazine serves as the foundation for this synthesis. The resulting oxazine is formed as a single diastereomer with the absolute configuration being dictated by the chirality of the cyclopropane. Other key steps include:
描述了 (+)-nakadomarin A 的全合成。羟胺、醛和环丙烷的三组分环加成反应形成高度官能化的四氢-1,2-恶嗪是该合成的基础。所得恶嗪形成为单一非对映异构体,其绝对构型由环丙烷的手性决定。其他关键步骤包括:通过还原使丙二酸去对称化、Heck 环化和吡咯烷形成,以及闭环复分解以形成两种环烯烃。总的来说,合成需要从环丙烷进行 23 个线性步骤,而环丙烷又可以从市售的 d-甘露醇中以光学纯形式获得(六个步骤)。
Lipase-Catalyzed Domino Kinetic Resolution/Intramolecular Diels–Alder Reaction: One-Pot Synthesis of Optically Active 7-Oxabicyclo[2.2.1]heptenes from Furfuryl Alcohols and -Substituted Acrylic Acids
作者:Shuji Akai、Tadaatsu Naka、Sohei Omura、Kouichi Tanimoto、Masashi Imanishi、Yasushi Takebe、Masato Matsugi、Yasuyuki Kita
The first lipase-catalyzed domino reaction is described in which the acyl moiety formed during the enzymatic kineticresolution of furfuryl alcohols (+/-)-3 with a 1-ethoxyvinyl ester 2 was utilized as a part of the constituent structure for the subsequent Diels-Alder reaction. The preparation of ester 2 from carboxylic acid 1 and the subsequent domino reaction were carried out in a one-pot reaction
HETEROARYL COMPOUNDS USEFUL AS INHIBITORS OF SUMO ACTIVATING ENZYME
申请人:Millennium Pharmaceuticals, Inc.
公开号:US20160009744A1
公开(公告)日:2016-01-14
Disclosed are chemical entities which are compounds of formula (I):
or pharmaceutically acceptable salts thereof; wherein Y, R
a
, R
a′
, R
b
, R
c
, X
1
, X
2
, X
3
, R
d
, Z
1
, and Z
2
have the values described herein and stereochemical configurations depicted at asterisked positions indicate absolute stereochemistry. Chemical entities according to the disclosure can be useful as inhibitors of Sumo Activating Enzyme (SAE). Further provided are pharmaceutical compositions comprising a compound of the disclosure and methods of using the compositions in the treatment of proliferative, inflammatory, cardiovascular, and neurodegenerative diseases or disorders.