Propargyl bromide → 2-Propynyloxyxanthen-9-one

참여 물질

반응 단계

A mixture of 2-hydroxyxanthen-9-one (2.12 g, 0.01 mol), K2CO3 (2.8 g, 0.02 mol), Kl (0.166 g, 0.001 mol), propargyl bromide (1.78 g, 0.015 mol) and acetone (100 mL) was refluxed 10 h and hot filtered. The solvent was evaporated and the residue was crystallized by toluene. This yields 2.25 g of a product with the following characteristics: m.p.153-154° C.; 1H NMR (CDCl3) δ: 2.58 (m, 1H), 4.8 (s, 2H), 7.35-8.38 (m, 7H).

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