Halogen acid-catalysed deprotection and cyclisation of Baylis-Hillman products obtained using O-benzylated salicylaldehyde precursors has been shown to afford 3-(halomethyl)coumarins (3-halomethyl-2H-1-benzopyran-2-ones) chemoselectively and in good yield.
研究表明,使用 O-苄基
水杨醛前体对巴利斯-希尔曼(Baylis-Hillman)产物进行卤酸催化脱保护和环化,可以
化学选择性地获得 3-(卤甲基)
香豆素(3-卤甲基-2H-1-苯并
吡喃-2-酮),而且收率很高。