Journal of Organic Chemistry p. 5106 - 5115 (1992)
Update date:2022-07-30
Topics:
Krafft, Marie E.
Juliano, Carmelinda A.
The use of bidentate ligands in the directed Pauson-Khand reaction was investigated.Substrates with a three-carbon linkage between the two heteroatoms gave better results than substrates containing two-carbon tethers.Higher yields and better regioselectivities were observed with thioamines and bisthioethers compared to diamines.Overall, only a few bidentate substrates showed marked improvements over previous results obtained with analogous monodentate compounds.Rationalizations based on the possible modes of cycloaddition operative for the various substrates studied are presented.
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