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Withdrawn Paper: "Edward J. Parish, Hang Sun, Stephen Kizito and Terrence L. Boos, An Improved Synthesis of 3b-Acetoxy-lanost-8-en-24-one (24-Ketolanosteryl Acetate). Molecules 2000, 5, 114-117"
Molecules 2000, 5(8), 993-997; doi:10.3390/50800993
Article

Lewis Acid Catalysis of the Diels–Alder Reaction Using Niobium and Tantalum Chlorides in the Presence of Coordinating Ligands

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Received: 29 June 2000 / Accepted: 1 August 2000 / Published: 5 August 2000
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Abstract

The Jacobsen and pybox type ligands effect chiral induction in the presence of niobium(V) chloride and tantalum(V) chloride in the Lewis acid catalysed Diels–Alder reaction.
Keywords: niobium; tantalum; bis-oxazoline; pybox niobium; tantalum; bis-oxazoline; pybox
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Howarth, J.; Gillespie, K. Lewis Acid Catalysis of the Diels–Alder Reaction Using Niobium and Tantalum Chlorides in the Presence of Coordinating Ligands. Molecules 2000, 5, 993-997.

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