2,3-Dihydrofuro[3,2-c]coumarin-3-one was synthesized in quantitative yield from 3-(ω-bromoacetyl)-4-hydroxycoumarin in the presence of nucleophiles (including solvents). This compound undergoes keto-enol tautomerization and easily reacts with aromatic and heteroaromatic aldehydes to form crotonization products having a Z configuration and exhibiting strong fluorescence.
2,3-二氢呋喃[3,2-c]
香豆素-3-酮在有亲核试剂(包括溶剂)存在的条件下,从3-(ω-
溴乙酰)-
4-羟基
香豆素合成,产率为定量。该化合物经历酮-烯醇互变异构反应,并与芳香和杂芳醛容易反应,形成具有Z构型且表现出强荧光的克罗顿化产物。