Enantioselective conjugate radical addition to α′-phenylsulfonyl enones
作者:Jin Young Lee、Sundae Kim、Sunggak Kim
DOI:10.1016/j.tetlet.2010.07.014
日期:2010.9
Enantioselectiveconjugateaddition reactions of alkyl radicals to α′-phenylsulfonyl enones are described. A bis-oxazoline-zinc triflate complex proved to be an effective catalyst leading to high enantioselectivities and chemical yields.
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