A new strategy for the C(7)-H functionalization of indoline derivatives using first-row transition-metal cobalt has been demonstrated wherein the pivaloyl group acts as a weakly coordinating directing group. Biologically important pyroquilon (tetrahydropyroquinolinone) derivatives have been synthesized in a one-pot manner through selective C(7)-H functionalization and concomitant cyclization. In this process, aromatic C–H and amidic C–N bonds are cleaved, and new C–C and C–N bonds are formed in a step-economical fashion. Further, selective C(7)-H alkenylation of indoline derivatives has also been accomplished using activated alkenes by varying the reaction conditions.

中文翻译：

---

钴催化的一步法获得吡咯烷酮和吲哚的C-7烯基化与活化烯烃的弱配位官能团

已经证明了使用第一行过渡金属钴对吲哚啉衍生物进行C（7）-H官能化的新策略，其中新戊酰基作为弱配位导向基团。通过选择C（7）-H功能化和伴随的环化，以一锅方式合成了生物学上重要的吡喹啉（四氢吡咯喹啉酮）衍生物。在此过程中，芳族CH–CH和酰胺C–N键被裂解，并以逐步经济的方式形成新的CC–CN键。此外，还通过使用活化的烯烃通过改变反应条件来完成二氢吲哚衍生物的选择性C（7）-H烯基化。