Experimental and Theoretical Investigation into the Gold-Catalyzed Reactivity of Cyclopropenylmethyl Acetates
作者:Elaine Seraya、Eric Slack、Alireza Ariafard、Brian F. Yates、Christopher J. T. Hyland
DOI:10.1021/ol101862u
日期:2010.11.5
Cyclopropenylmethyl acetates have been shown to undergo rapid and stereoselective gold catalyzed rearrangement to Z-acetoxydienes in high yield. OFT calculations have shown that while several reaction pathways can be envisaged only a single, ring-opening one operates.
Titanium-mediated rearrangement of cyclopropenylmethyl acetates to (E)-halodienes
作者:Gary Gallego、Alireza Ariafard、Kiet Tran、David Sandoval、Leera Choi、Yi-Hsun Chen、Brian F. Yates、Fu-Ming Tao、Christopher J. T. Hyland
DOI:10.1039/c0ob01046d
日期:——
TiCl4 and TiBr4 rapidly transform cyclopropenylmethyl acetates to (E)-halodienes via ring-opening to allyl-vinyl cations. DFT calculations suggest that the regioselectivity of the halogenation of this cationic intermediate by [TiX4OAc]− is under thermodynamic control, while the stereoselectivity is governed by kinetics.