Stereo- and regio-controlled carbon-carbon bond formation mediated by tungsten in the s-trans-η4-diene cationic intermediates
Journal
Journal of the Chemical Society, Chemical Communications
Journal Issue
1
Pages
45-46
Date Issued
1992
Author(s)
Abstract
The tungsten-η3-2-substituted pentadienyl complexes WC 5H5(CO)2(syn-η3-R-C 5H6) (R = COOMe; CMe=CH2) undergo BF 3-catalysed stereoselective carbon-carbon bond formation with aldehydes to afford isolable s-trans-diene cations which after hydrolysis produces tungsten-η3-allyl-1,3-diols; utilization of the diols for stereoselective synthesis of α-methylene-γ-butyrolactones, furanone skeletons, have been reported in good yields (> 80%).
Type
journal article