铂（II）催化的1,6-二烯环异构化反应：在无β-氢消除情况下的周转数
Platinum(II)-catalyzed 1,6-diene cycloisomerizations: turnover in the absence of beta-hydride elimination.
作者信息
Kerber William D, Koh Jeong Hwan, Gagné Michel R
机构信息
Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, USA.
出版信息
Org Lett. 2004 Aug 19;6(17):3013-5. doi: 10.1021/ol048780u.
Electrophilic pincer-ligated Pt(II)-dications are efficient catalysts for the cycloisomerization of 1,6-dienes, initiated by alkene activation. The tridentate ligands inhibit beta-hydride elimination and thus enable cationic mechanisms that turnover by Pt(II) extrusion. PPP ligands lead to cyclopropane products, while PNP ligands provide cyclohexene products; mechanistic issues are also discussed.
亲电钳形配位的Pt(II)二价阳离子是1,6 - 二烯环异构化反应的高效催化剂，该反应由烯烃活化引发。三齿配体抑制β - 氢化物消除，从而使通过Pt(II)挤出实现周转的阳离子机制成为可能。PPP配体生成环丙烷产物，而PNP配体生成环己烯产物；同时也讨论了反应机理问题。
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