synthetic route to the title compound was explored by featuring the [2+2]-cycloaddition reaction of chlorosulfonyl isocyanate with the 4H-1,3-dioxin derivative readily obtainable from methyl (R)-3-hydroxybutyrate, the Baeyer-Villiger reaction resulting in novel cleavage of the acetal moiety, and the Reformatsky reaction with sterically crowded 3-(2-bromopropionyl)-2-oxazolidone derivatives.
通过特征在于
氯磺酰基
异氰酸酯与4 H -1,3-二恶英衍
生物的[2 + 2]-环加成反应,可容易地从标题(Ba )的(R)-
3-羟基丁酸甲酯中获得,来探索标题化合物的高度立体选择性合成路线。-Villiger反应导致新的
乙缩醛部分裂解,以及与空间拥挤的3-(2-
溴丙酰基)-2-
恶唑烷
酮衍
生物发生Reformatsky反应。