Journal
ORGANOMETALLICS
Volume 28, Issue 4, Pages 950-952Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om801069s
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- National Institutes of Health, Institute of General Medicine [GM-60578]
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In situ generated [(PPP)Pt][BF4](2) (PPP = triphos) catalyzes the cycloisomerization of 1,6-enyne-ols by initiative pi-activation of the alkyne. This generates an isolable cationic Pt-alkenyl species, which subsequently participates in turnover-limiting protonolysis with in situ generated acid. This latter reactivity contrasts cationic Pt-alkyls, which are more difficult to protonolyze. Mechanistic studies on isolated Pt-alkenyls and deuterium labeling helped to elucidate the mechanistic details.
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