Tetrahedron letters

Preparation of 1-naphthols from acetylenes and o-phthalaldehyde using low-valent tantalum and niobium.

Y Kataoka, J Miyai, M Tezuka, K Takai, K Oshima…

Index: Kataoka; Miyai; Tezuka; Takai; Oshima; Utimoto Tetrahedron Letters, 1990 , vol. 31, # 3 p. 369 - 372

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Citation Number: 29

Abstract

Abstract Tantalum (or niobium)-alkyne complexes are produced by treatment of acetylenes with the low-valent tantalum (niobium) derived by zinc reduction of TaCl 5 (NbCl 5). Substituted 1-naphthols are prepared regioselectively by reaction of o-phthalaldehyde with the tantalum (or niobium)-alkyne complexes in good to excellent yields.

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