Golden Carousel in Catalysis: The Cationic Gold/Propargylic Ester Cycle

• Published in: Angewandte Chemie (International ed.) Vol. 47; no. 4; pp. 718 - 721
• Main Authors: Correa, Andrea, Marion, Nicolas, Fensterbank, Louis, Malacria, Max, Nolan, Steven P, Cavallo, Luigi
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley-VCH Verlag 01.01.2008; WILEY-VCH Verlag; WILEY‐VCH Verlag
• Subjects: alkynes; Alkynes - chemistry; allenes; Catalysis; Cations - chemistry; density functional calculations; Esters - chemistry; gold; Gold - chemistry; homogeneous catalysis; Ligands; Models, Chemical; Molecular Structure; Stereoisomerism; Thermodynamics

Round and round it goes: Propargylic esters are versatile substrates for Au‐based catalysts. However, under typical conditions the starting Au‐coordinated propargylic ester 1 is in rapid equilibrium with the gold vinylic carbenoid species 2 and with gold allene species 3. A number of factors dictate...