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Please login to access the full content or check if you have access via Method 1: Reaction of Bis(η5-cyclopentadienyl)titanium(II)–Phosphine Complexes with Alkynes or Allenes

DOI: 10.1055/sos-SD-002-00576

Mikami, K.; Matsumoto, Y.; Shiono, T.Science of Synthesis, (20032538.

The ability of titaniumphosphine complexes to induce CC coupling reactions with alkenes, alkynes, and carbonyl compounds has been applied to the synthesis of metallacycles.[‌307‌] The reaction of [Ti(Cp)2(PMe3)2] (116) with a range of alkynes affords the corresponding titanacyclopentadienes 176-178 and 132 and titaniumalkyne complex 179 (Scheme 89).[‌308‌,‌309‌] Homocoupling of allenes with low-valent titanium complexes [Ti(Cp)2(PMe3)2] (116) or [Ti(Cp)2(PMe3)(H2C=CH2)] (180) affords bis(alkylidene)titanacyclopentane 182 via titaniumallene complex 181 (Scheme 89).[‌310‌]

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