The addition of tri-sec-butylborohydrides to the 2-acetyl-1,3-oxazolidine 1 can be directed with high selectivity to either the Si or the ReÏ-carbonyl face under chelating or non-coordinating conditions, respectively.
在螯合或非配位条件下,将三仲丁基
硼氢化物加成到 2-乙酰基-
1,3-恶唑烷 1 上,可以分别高选择性地定向到 Si 或 Re-羰基面。