title: Rhodium(I)-Catalyzed
abstract: The regiospecific introduction of substituents into the 4-position of 2,3-dihydroindoles (indolines), which is significant for the synthesis of various natural products and pharmaceuticals, was achieved by rhodium(I)-catalyzed cyclotrimerizations of 1 with acetylene to give 2. Up to four substituents can be introduced simultaneously into the indoline core by using this novel strategy. R=OH, OBzl, Otetrahydropyranyl, NHSO(2)C(6)H(4)CH(3); Ts=H(3)CC(6)H(4)SO(2).
authors.affiliation: Fachbereich Chemie der Universität, Erwin-Schrödinger-Straße, D-67663 Kaiserslautern (Germany).
authors.initials: B
authors.lastname: Witulski
authors.initials: T
authors.lastname: Stengel