Potassium Carbonate-Catalyzed Reactions of Salicylic Aldehydes with Allenic Ketones and Esters: an Effective Way to Synthesize Functionalized 2H-Chromenes
作者:Min Shi、Lun-Zhi Dai、Yong-Ling Shi、Gui-Ling Zhao
DOI:10.1002/adsc.200505496
日期:2006.5
Potassium carbonate-catalyzed reactions of salicylic aldehydes with 3-methylpenta-3,4-dien-2-one, 3-benzylpenta-3,4-dien-2-one or ethyl 2-methylbuta-2,3-dienoate gave the corresponding functionalized 2H-1-chromenes in good to excellent yields and good stereoselectivities in some cases in DMSO at 120 °C within 1 h, respectively.
碳酸钾催化的水杨醛与3-甲基戊-3,4-二烯-2-酮,3-苄基戊-3,4-二烯-2-酮或2-甲基丁-2,3-二烯乙基乙酯的反应在某些情况下,在DMSO中于120°C下1 h内,分别以良好至极好的收率和良好的立体选择性对2 H -1-色烯进行了功能化。