Palladium-Catalyzed Cyclopentenone Formation by Carbonylative Cycloaddition of Allylic Tosylates and Alkynes
作者:Naofumi Tsukada、Shuichi Sugawara、Tomohiro Okuzawa、Yoshio Inoue
DOI:10.1055/s-2006-942538
日期:——
Carbonylative cycloaddition of allyl tosylates and alkynes proceeded in the presence of palladium catalysts to afford a range of cyclopentenones. In the presence of methanol, five-component coupling reactions gave methyl cyclopentenyl acetates, whereas in the absence of methanol, (cyclopentenoylmethylidene)furanones were formed from six components. Allyl tosylate was found to be essential for these
甲苯磺酸烯丙酯和炔烃的羰基化环加成在钯催化剂存在下进行,得到一系列环戊烯酮。在甲醇存在下,五组分偶联反应得到甲基环戊烯基乙酸酯,而在没有甲醇的情况下,由六组分形成(环戊烯酰基亚甲基)呋喃酮。发现甲苯磺酸烯丙酯对这些反应是必不可少的,因为乙酸烯丙酯和烯丙基溴被证明是无效的。