4]-azaspirocycles by employing the Heyns reactivity upon its electrophilic modification. The chiral phosphoric acid is an efficient catalyst for this transformation and allows to access a wide range of cyclobutanone containing 1-azaspirocycles with excellent enantio- and diastereoselectivities.
我们通过利用其亲电修饰的海恩斯反应性,开发了一种统一的策略来不对称构建[3,4]-氮杂螺环。手性
磷酸是这种转化的有效催化剂,可以得到多种含有 1-氮杂螺环的
环丁酮,具有优异的对映选择性和非对映选择性。