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Carbonylation of alkynols catalyzed by Pd(II)/2-PyPPh 2 dissolved in organic solvents and in ionic liquids: a facile entry to α-methylene γ- and δ-lactones by Crestina S Consorti; Gunter Ebeling; Jaı̈rton Dupont is a Chemistry article available to read on EtoBox.

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The carbonylation of terminal 3-alkyn-1-ols and 1-alkyn-4-ols by Pd(OAc) 2 associated with 2-(diphenylphosphino)pyridine (2-PyPPh 2 ) dissolved in organic solvents or in 1-n-butyl-3-methyl imidazolium ionic liquids affords quantitatively and selectively exo-a-methylene gand d-lactones, respectively. In the case of the reactions performed in ionic liquids (biphasic conditions), the lactones were isolated by simple distillation and the ionic catalyst solution can be reused.

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Author

Crestina S Consorti; Gunter Ebeling; Jaı̈rton Dupont

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0040-4039)

Published

2002

Language

EN

Field

Chemistry (Physical Sciences)