A method of preparing an intermediate of salmeterol (Compound 1, 2-amino-1-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl) ethanol) includes: reacting compound 2 with 2-methoxypropene in a first organic solvent to produce a reaction solution including compound 3, compound 2 including a 2-bromo precursor of Compound 1; reacting compound 3 with a nitrogen source to produce compound 4; reacting compound 4 with sodium borohydride in a second organic solvent to produce compound 5; and debenzylating compound 5 by ammonium formate / palladium-carbon catalytic transfer hydrogenation in a third organic solvent to produce Compound 1. A method of preparing salmeterol includes preparing Compound 1, and reacting Compound 1 to prepare salmeterol.
一种制备
沙美特罗(化合物1,2-
氨基-1-(2,2-二甲基-4H-1,3-苯并二氧杂环-6-基)
乙醇)中间体的方法包括:在第一有机溶剂中反应化合物2和
2-甲氧基丙烯,以产生包括化合物3的反应溶液,化合物2包括化合物1的2-
溴前体;将化合物3与氮源反应以产生化合物4;在第二有机溶剂中将化合物4与氢化
硼酸钠反应以产生化合物5;并通过
氨甲酸盐/
钯-碳催化转移氢化在第三有机溶剂中脱苄基化合物5以产生化合物1。一种制备
沙美特罗的方法包括制备化合物1,并将化合物1与其他试剂反应以制备
沙美特罗。