Studies on the use of bidentate ligands in the directed Pauson-Khand reaction
摘要:
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.
Studies on the use of bidentate ligands in the directed Pauson-Khand reaction
摘要:
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.
Studies on the use of bidentate ligands in the directed Pauson-Khand reaction
作者:Marie E. Krafft、Carmelinda A. Juliano
DOI:10.1021/jo00045a021
日期:1992.9
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.