Platinum(II)-phosphole complexes: synthesis and evaluation as enyne cycloisomerisation catalysts.
Dalton Trans
; 43(18): 6728-34, 2014 May 14.
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| MEDLINE
| ID: mdl-24643759
ABSTRACT
A series of platinum(II)-monophosphole complexes has been synthesized and used in enyne cycloisomerisations in order to study the effect of the ligand on the catalytic activity and selectivity. Reactions were performed on various N- or C-tethered 1,6-enynes and in the absence or in the presence of nucleophiles. For the most efficient cationic Pt(II)-complexes, it was also evidenced that the counterion and/or the solvent could have an influence on both the efficiency and the selectivity in the competition between the 5-exo-dig and the 6-endo-dig processes.
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2014
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