Inter- and Intramolecular Addition/Cyclizations of Sulfonamide Anions with Alkynyliodonium Triflates. Synthesis of Dihydropyrrole, Pyrrole, Indole, and Tosylenamide Heterocycles
摘要:
The synthesis of dihydropyrroles, pyrroles, and indoles through [3-atom $ 2-atom] combination of ethyl or aryl tosylamide anions with phenyl(propynyl)iodonium triflate, and the base-mediated intramolecular bicyclization of alkynyliodonium-bearing tosylamide or tosylimide substrates to furnish bicyclic and tricyclic tosylenamide (-enimide) products, is described. A detailed discussion of the scope, limitations, byproduct formation, and the basis for observed diastereoselectivity is presented.
Synthesis of Spiroquinolines through a One-Pot Multicatalytic and Multicomponent Cascade Reaction
作者:José Barluenga、Abraham Mendoza、Félix Rodríguez、Francisco J. Fañanás
DOI:10.1002/anie.200802582
日期:2008.9.1
Cobalt-mediated cycloisomerization of δ-substituted ε-acetylenic β-ketoesters construction of angular triquinane by a sequence ene/Pauson-Khand reactions
作者:Jean-Luc Renaud、Corinne Aubert、Max Malacria
DOI:10.1016/s0040-4020(99)00172-6
日期:1999.4
The preparation of δ-substituted ε-acetylenic β-ketoesters is fully described. Their cobalt-mediated Conia-ene reactions led to variously functionalized methylenecyclopentanes in high yields and with a moderate control of the 1,4 diastereoselectivity. A sequence involving the cobalt-mediated ene and Pauson-Khand reactions is presented and allowed the construction of the angular triquinane framework
Inter- and Intramolecular Addition/Cyclizations of Sulfonamide Anions with Alkynyliodonium Triflates. Synthesis of Dihydropyrrole, Pyrrole, Indole, and Tosylenamide Heterocycles
作者:Ken S. Feldman、Michelle M. Bruendl、Klaas Schildknegt、Adolph C. Bohnstedt
DOI:10.1021/jo9605814
日期:1996.1.1
The synthesis of dihydropyrroles, pyrroles, and indoles through [3-atom $ 2-atom] combination of ethyl or aryl tosylamide anions with phenyl(propynyl)iodonium triflate, and the base-mediated intramolecular bicyclization of alkynyliodonium-bearing tosylamide or tosylimide substrates to furnish bicyclic and tricyclic tosylenamide (-enimide) products, is described. A detailed discussion of the scope, limitations, byproduct formation, and the basis for observed diastereoselectivity is presented.