Novel synthesis and cytotoxic activity of 1,4-disubstituted 3-methylidene-3,4-dihydroquinolin-2(1H)-ones
作者:Marlena Pięta、Jacek Kędzia、Anna Janecka、Dorota K. Pomorska、Marek Różalski、Urszula Krajewska、Tomasz Janecki
DOI:10.1039/c5ra16673j
日期:——
1,4-Disubstituted 3-methylidene-3,4-dihydroquinolin-2(1H)-ones were efficiently synthesized using a Horner–Wadsworth–Emmons approach and their cytotoxic activity was evaluated.
Nickel-Catalyzed Enantioselective Carbamoyl Iodination: A Surrogate for Carbamoyl Iodides
作者:Austin D. Marchese、Marco Wollenburg、Bijan Mirabi、Xavier Abel-Snape、Andrew Whyte、Frank Glorius、Mark Lautens
DOI:10.1021/acscatal.0c00841
日期:2020.4.17
This work reports the enantioselective formal transfer of a carbamoyl iodide across a 1,1-disubstituted styrene using Ni-catalysis. Employing an air-stable Ni(II) precatalyst and a commercially available chiral ligand ((S)-tBuPHOX), enantioenriched 3,3-disubstituted iodooxindoles were obtained in up to 90% yield and up to 97:3 e.r. This methodology was applied to the total synthesis of (−)-esermethole
Regiodivergent Ring-Expansion of Oxindoles to Quinolinones
作者:Hendrik L. Schmitt、Den Martymianov、Ori Green、Tristan Delcaillau、Young Seo Park Kim、Bill Morandi
DOI:10.1021/jacs.3c12119
日期:2024.2.21
The development of divergent methods to expedite structure–activity relationship studies is crucial to streamline discovery processes. We developed a rare example of regiodivergent ring expansion to access two regioisomers from a common starting material. To enable this regiodivergence, we identified two distinct reaction conditions for transforming oxindoles into quinolinone isomers. The presented