Visible-light driven electron–donor–acceptor (EDA) complex-initiated synthesis of thio-functionalized pyridines
作者:Hirendra Nath Dhara、Amitava Rakshit、Dinabandhu Barik、Koustuv Ghosh、Bhisma K. Patel
DOI:10.1039/d3cc01678a
日期:——
A visible-light-induced electron–donor–acceptor (EDA)-aggregated radical cyclization between (E)-2-(1,3-diarylallylidene)malononitriles and thiophenols leads to poly-functionalized thio pyridines.
Phosphine-catalyzed domino reaction: a novel sequential [2+3] and [3+2] annulation reaction of γ-substituent allenoates to construct bicyclic[3, 3, 0]octene derivatives
作者:Erqing Li、You Huang
DOI:10.1039/c3cc47716a
日期:——
We have successfully developed a novel and efficient phosphine-catalyzed sequential [2+3] and [3+2] annulation reaction of gamma-substituent allenoates to construct bicyclic[3, 3, 0]octene derivatives. The protocol uses readily available gamma-substituent allenoates as the starting materials, inexpensive PBu3 as the catalyst, and the corresponding products were obtained in good to excellent yields
Visible-Light-Mediated Solvent-Switched Photosensitizer-Free Synthesis of Polyfunctionalized Quinolines and Pyridines
作者:Hirendra Nath Dhara、Amitava Rakshit、Tipu Alam、Ashish Kumar Sahoo、Bhisma K. Patel
DOI:10.1021/acs.orglett.2c04027
日期:2023.1.27
(EtOH)) switched synthesis of quinolines and pyridines is illustrated from (E)-2-(1,3-diphenylallylidene)malononitriles via a Pd(II)-catalyzed photochemical process. The active catalyst [L2Pd(0)] generated serves as an exogenous photosensitizer. The process offers predominantly Z-alkenylated quinolines and pyridines in TFE and EtOH, respectively. Furthermore, large-scale synthesis and a few interesting