Rapid construction of tetrahydropyridine scaffolds <i>via</i> formal imino Diels–Alder reactions of Schiff bases and Nazarov reagents
作者:Yen-Ku Wu、Viresh H. Rawal
DOI:10.1039/c9ob01880h
日期:——
Described is a one-flask, two-step method for the synthesis of highly functionalized piperidines. The process involves formal [4 + 2] cycloadditions of Schiffbases and Nazarov reagents, followed by facile elaborations of the initial cycloadducts. Notably, these aza-annulations are facilitated by protic solvents and proceed smoothly under ambient conditions, without other additives. The synthetic utility
Pd-catalyzed asymmetric allylic alkylations via C–H activation of N-allyl imines with glycinates
作者:Barry M. Trost、Xiaoxun Li
DOI:10.1039/c7sc02899g
日期:——
Herein is reported the first example of palladium-catalyzedasymmetricallylic alkylation (AAA) reactions involving 2-aza-π-allyl palladium intermediates. The 2-aza-π-allyl complex was generated via a novel mode of activation of N-allyl imines. Pd-catalyzed C(sp3)–H activation of N-allyl imines and subsequent nucleophilic attack by glycinates delivered vicinal diamino derivatives as the sole regioisomers