7-溴-4-羟基苯并二氢吡喃

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: In analogy to the procedures described fort he preparation of intermediates A-2 [B] and A-2 [C], (rac)-7-bromo-chroman-4-ol prepared from 7-bromo-chroman-4-one with sodium borohydride in ethanol at 60-70° C., was treated with diphenylphosphoryl azide, DBU in toluene to give (rac)-4-azido-7-bromo-chroman, which was subsequently reduced with triphenylphosphine in THF/water to yield the title compound as light yellow oil. MS: 227 (M+, 1Br).