Synthesis of the γ-Amino-β-hydroxy Acid of Hapalosin via an Asymmetric Dihydroxylation Route
作者:Martin E. Maier、Christoph Hermann
DOI:10.1016/s0040-4020(99)01052-2
日期:2000.1
Starting from the allylic alcohol 3, the epoxide 7 was prepared by asymmetric dihydroxylation of the allylic chloride followed by subsequent protection of the secondary hydroxy group. Opening of the oxirane with phenyl cuprate gave the triol 8 with a free hydroxy group. Mitsunobu reaction of 8 with diphenylphosphoryl azide led to the azide 9. Simple functional group manipulations delivered the acid
由烯丙基醇3开始,通过烯丙基氯的不对称二羟基化,随后保护仲羟基来制备环氧化物7。用铜酸苯酯打开环氧乙烷,得到具有游离羟基的三醇8。8与二苯基磷酰基叠氮化物的Mitsunobu反应导致叠氮化物9。简单的官能团操作可在另外五个步骤中递送酸2。