tetrahydrofurans, 13- and 15-membered ring aza-macrocycles can be prepared selectively via formal [1 + 4], [5 + 4 + 4] and [3 + 4 + 4 + 4] condensations of α-imino carbenes and oxetanes under Rh(II)-catalysis or thermal activation. Spirocyclic N-heterocycles are also accessible by means of Buchwald–Hartwig and Pictet–Spengler cyclizations. By reaction control, substrate selection or further derivatization, a
                                    以N-磺酰基三唑为底物,可以通过[1 + 4],[5 + 4 + 4]和[3 + 4 + 4 + 4]在Rh(II)催化或热活化下,α-亚
氨基卡宾和氧杂
环丁烷的缩合反应。还可通过Buchwald–Hartwig和Pictet–Spengler环化获得螺环N-杂环。通过反应控制,底物选择或进一步衍生化,因此可实现多种
化学结构。最后,使用三唑在热活化下反应,获得了有趣的机理见解。