Pd/Pivalic Acid Mediated Direct Arylation of 2-Pyrones and Related Heterocycles
作者:Leticia M. Pardo、Aisling M. Prendergast、Marie-T. Nolan、Eoin Ó Muimhneacháin、Gerard P. McGlacken
DOI:10.1002/ejoc.201500262
日期:2015.6
Directarylation represents a favourable alternative to traditional cross-coupling reactions and has found widespread use with simple aryls and robust heterocycles. Herein a directarylation protocol has been optimised and applied to more delicate, privileged biological motifs. The intramolecular directarylation of 2-pyrones, 2-coumarins, 2-pyridones and 2-quinolones occurs in very good to excellent
Coumarins are a large family of natural and synthetic compounds exerting different pharmacological effects, including cytotoxic, anti-inflammatory or antimicrobial. In the present communication we report the synthesis of a series of 12 diversely substituted 4-oxycoumarin derivatives including methoxy substituted 4-hydroxycoumarins, methyl, methoxy or unsubstituted 3-aryl-4-hydroxycoumarins and 4-benzyloxycoumarins and their anti-proliferative effects on breast adenocarcinoma cells (MCF-7), human promyelocytic leukemia cells (HL-60), human histiocytic lymphoma cells (U937) and mouse neuroblastoma cells (Neuro2a). The most potent bioactive molecule was the 4-hydroxy-5,7-dimethoxycoumarin (compound 1) which showed similar potency (IC50 0.2-2 mu M) in all cancer cell lines tested. This non-natural product reveals a simple bioactive scaffold which may be exploited in further studies. (c) 2012 Elsevier Ltd. All rights reserved.
Cravotto, Giancarlo; Nano, Gian Mario; Palmisano, Giovanni, Synthesis, 2003, # 8, p. 1286 - 1291
作者:Cravotto, Giancarlo、Nano, Gian Mario、Palmisano, Giovanni、Tagliapietra, Silvia
DOI:——
日期:——
SUZUKI EIJI; KATSURAGAWA BUNZO; INOUE SHOJI, J. CHEM. RES. SYNOP., 1979, NO 3, 110-111