A three step, convergent synthesis of 4-aryl-3-pyrrolin-2-ones from a tetramic acid has been developed. The key transformation utilized a Suzuki-Miyaura cross-coupling reaction between a 4-tosyloxy-3-pyrrolin-2-one and an arylboronic acid. This work also provides access to 4-arylpyrrolidin-2-ones, cyclic analogs of gamma-aminobutyric acid (GABA). Hydrogenation of 4-(4'-chloro-phenyl)-3-pyrrolin-2-one proceeded smoothly to give baclofen lactam. (c) 2006 Elsevier Ltd. All rights reserved.
[EN] TAMBJAMINES AND B-RING FUNCTIONALIZED PRODIGININES<br/>[FR] TAMBJAMINES ET PRODIGININES FONCTIONNALISÉES À CYCLE B
申请人:UNIV PORTLAND STATE
公开号:WO2016176450A1
公开(公告)日:2016-11-03
Embodiments of tambjamines and B-ring functionalized prodiginines are disclosed. Methods of synthesizing and using the disclosed compounds are also disclosed. Some embodiments of the disclosed compounds have antimalarial activity. Certain embodiments of the disclosed compounds have been shown to clear parasitemia in mice, and/or are curative in a single dose without toxicity.
Au-allenylidene promoted decarboxylative annulation to access unsaturated γ-lactams/lactones
作者:Xuelun Duan、Haotian Shi、Yangyang Yue、Wangze Song
DOI:10.1039/d4cc00200h
日期:——
A novel Au-allenylidene promoted decarboxylative annulation by intramolecular α-nucleophilic addition has been disclosed. The unsaturated cyclic ethynylethylene carbamates/carbonates can be converted to unique nucleophiles attached with alkylidene ketenes by sequential decarboxylation and oxidation processes. Such alkylidene ketenes can be rapidly trapped by intramolecular α-attacking annulation to
Rh–IndOlefOx catalyzed conjugate addition/Heck-type coupling of organoboronics to a lactam or a lactone
作者:Noora Kuuloja、Matti Vaismaa、Robert Franzén
DOI:10.1016/j.tet.2012.01.040
日期:2012.3
Four indole-olefin-oxazoline (IndOlefOx) ligands were synthesized and evaluated in Rh-catalyzed reactions between organoboronics and a lactam or a lactone. In addition to the expected conjugate addition products, the formation of significant amounts of Heck-type products was observed. The scope and limitations of these reactions were investigated. (C) 2012 Elsevier Ltd. All rights reserved.