The gold(I)-catalyzed intermolecular cyclopropanation of alkenes with 1,6-enynes is an electrophilic process, which is mechanistically related to the well-known Simmons-Smith reaction proceeding through zinc carbenoids. This cyclopropanation is stereospecific, even in cases where the reaction was found to proceed stepwise. © The Royal Society of Chemistry 2011.
Pérez-Galán, P., Herrero-Gómez, E., Hog, D. T., Martin, N. J. A., Maseras, F., & Echavarrenx, A. M. (2011). Mechanism of the gold-catalyzed cyclopropanation of alkenes with 1,6-enynes. Chemical Science, 2(1), 141-149. https://doi.org/10.1039/c0sc00335b