Rhodium-Catalyzed Denitrogenative [3+2] Cycloaddition: Access to Functionalized Hydroindolones and the Framework of Montanine-Type<i>Amaryllidaceae</i>Alkaloids
denitrogenative [3+2] cycloaddition of 1‐sulfonyl‐1,2,3‐triazoles with cyclic silyl dienol ethers has been developed for the synthesis of functionalized hydroindolones or their corresponding silyl ethers. The present method has been employed to construct synthetically valuable bicyclo[3.3.1]alkenone derivatives and pyrrolidine‐ring‐containing bicyclic indole compounds. As a further synthetic application, a stereoselective
POLYCYCLIC CARBOGENIC MOLECULES AND USES THEREOF AS ANTI-CANCER AGENTS
申请人:Northwestern University
公开号:US20190127306A1
公开(公告)日:2019-05-02
Disclosed are new polycyclic carbogenic molecules and their methods of synthesis. The new polycyclic carbogenic molecules may be utilized in anti-cancer therapies. In particular, the polycyclic carbogenic molecules may be formulated as pharmaceutical compositions that comprise the small molecules, which compositions may be administered in methods of treating and/or preventing cell proliferative diseases and disorders such as cancer. The new polycyclic carbogenic molecules may be prepared from vinyl- or allyl-substituted cyclohexenone precursors via preparation of a silyl bis-enol ether intermediate.
A Strategy for the Convergent and Stereoselective Assembly of Polycyclic Molecules
作者:Emily E. Robinson、Regan J. Thomson
DOI:10.1021/jacs.7b13234
日期:2018.2.7
The stereoselective oxidative coupling of cyclic ketones via silyl bis-enol ethers followed by ring-closing metathesis is shown to be a general and powerful reaction sequence for the preparation of diverse polycyclic scaffolds from simple precursors. The modular strategy successfully constructs substructures prevalent in numerous bioactive natural product families, varying in substitution and carbocyclic
Mn(III)-Based Oxidative Free-Radical Cyclizations of Unsaturated Ketones
作者:Bridget McCarthy Cole、Luning Han、Barry B. Snider
DOI:10.1021/jo961199u
日期:1996.1.1
free-radical cyclization of unsaturated ketones is a versatile synthetic procedure with broad applicability. For example, oxidation of cyclopentanone 1a with 2 equiv of Mn(OAc)(3).2H(2)O and 1 equiv of Cu(OAc)(2).H(2)O in AcOH at 80 degrees C for 1.5 h affords 75% of bicyclo[3.2.1]oct-3-en-8-one 8a and 15% of bicyclo[3.2.1]oct-2-en-8-one 9a. Bridgedbicyclicketones that cannot enolize further are isolated
Organocatalytic dynamic kinetic resolution via conjugate addition: synthesis of chiral trans-2,5-dialkylcyclohexanones
作者:Ganesh Pandey、Priyanka A. Adate、Vedavati G. Puranik
DOI:10.1039/c2ob26597d
日期:——
A novel strategy of initiating an organocatalysed dynamic kinetic resolution (dr up to 99 : 1 and er up to 94 : 6) for the synthesis of chiral trans-2,5-dialkylcyclohexanones by an asymmetric conjugate addition of dimethyl malonate on to 6-substituted cyclohexenones is reported.