title: Mixed phosphane η5-CpRuCl(PR3)2 complexes as ambifunctional catalysts for anti-Markovnikov hydration of terminal alkynes.
abstract: The catalytic activity of [CpRu(L)(2)(MeCN)]PF(6) (L = 2-diphenylphosphinopyridine with bulky groups at C-6) for anti-Markovnikov hydration of terminal alkynes to aldehydes is retained when one heterocyclic ligand L is replaced by L' = PPh(3). Equal amounts of CpRuCl(PPh(3))(2) (1) and phosphane L in acetone solution equilibrate to a mixture of 1, CpRuCl(L)(PPh(3)) (2), and CpRuCl(L)(2) (3), which acts as highly active in situ catalyst for preparative anti-Markovnikov hydration of alkynes in water-rich media (2 mol % [Ru], 60 °C, 3-18 h in 4:1 (v/v) acetone/water). Reactions were completed in <15 min at 160 °C.
authors.affiliation: Department Chemie, Technische Universität München, Lichtenbergstrasse 4, 85748 Garching bei München, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Boeck
authors.forename: Thomas
authors.initials: T
authors.lastname: Kribber
authors.forename: Li
authors.initials: L
authors.lastname: Xiao
authors.forename: Lukas
authors.initials: L
authors.lastname: Hintermann