Palladium-catalyzed C8-H alkoxycarbonylation of 1-naphthylamines with alkyl chloroformates
ORGANIC & BIOMOLECULAR CHEMISTRY
Authors: Shi, Yaqi; Yang, Fan; Wu, Yangjie
Abstract
A simple and efficient protocol for palladium-catalyzed C8-H alkoxycarbonylation of 1-naphthylamine derivatives with alkyl chloroformates has been developed, exhibiting broad functional group tolerance, high regioselectivity, and oxidant-free conditions. Furthermore, the reaction features its ease of further functionalization and transformation. For example, the concise synthesis of one BET bromodomain inhibitor was accomplishedviabenz[cd]indol-2(1H)-one after multistep transformations from the obtained alkoxycarbonylation product. In addition, the control experiments suggest that the reaction might involve a radical process and the C-H bond cleavage might not be involved in the rate-determining step.
Challenging foreign body surgery: residual needlefish jaws
BRITISH JOURNAL OF NEUROSURGERY
Authors: El Ouadih, Youssef; Pham Dang, Nathalie; Groza, Dmitrii; Thiombiano, Abdoulaye; Khalil, Toufic; Kemeny, Jean Louis; Lemaire, Jean Jacques
Abstract
We report a case of a needlefish jaws retained near the C5-C6 joint that was associated with chronic pain and inflammation and seen confirmed by FDG-PET scan. Two unsuccessful surgeries using an anterior approach were complicated by vascular and nerve injuries. We used image-guided surgery with a posterior approach.