Reactions of aliphatic terminal alkynes with Ti(OiPr)4/BuLi: selectivity, kinetic aspects, and a new tetramerisation process - Université de Rennes Accéder directement au contenu
Article Dans Une Revue ARKIVOC - Online Journal of Organic Chemistry Année : 2024

Reactions of aliphatic terminal alkynes with Ti(OiPr)4/BuLi: selectivity, kinetic aspects, and a new tetramerisation process

Résumé

The reactions of terminal aliphatic alkynes with Ti(OiPr)4/nBuLi or Ti(OiPr)4/sBuLi were investigated. These substrates were transformed more slowly than previously studied 1-aryl acetylene compounds and mixtures of products were generally obtained. This allowed the rate constants of the elementary steps involved to be evaluated. One substrate was shown to undergo cyclotrimerisation with high regioselectivity in favour of the 1,2,4 adduct. Furthermore, an unprecedented tetramerisation process was uncovered.

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Chimie organique
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hal-04480083 , version 1 (27-02-2024)

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Wahiba Frites, Xiang Ren, Gabriela Siemiaszko, Marie Cordier, Lamouri Hammal, et al.. Reactions of aliphatic terminal alkynes with Ti(OiPr)4/BuLi: selectivity, kinetic aspects, and a new tetramerisation process. ARKIVOC - Online Journal of Organic Chemistry, 2024, 2024 (2), pp.202312141. ⟨10.24820/ark.5550190.p012.141⟩. ⟨hal-04480083⟩
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