Spirotetrahydropyridine-3-carboxylates 4 and 5 were prepared from olefins 2 and isoxazol-5-one 1 through a highly diastereoselective tandem sequential process. Three reaction workup procedures were employed, each of which afforded a different product distribution.
螺四氢
吡啶-3-
羧酸酯4和5是由烯烃2和
异恶唑-5-酮1通过高度非对映选择性串联顺序方法制备的。采用了三种反应后处理程序,每种程序提供不同的产物分布。