Rhodium-catalyzed one-pot hydroformylation–cyclization of allylbenzene derivatives: Simple and efficient route to 5, 6-dihydronaphthalenes

M Alhaffar, R Suleiman, B El Ali

Index: Alhaffar, Mouheddin; Suleiman, Rami; Ali, Bassam El Catalysis Communications, 2010 , vol. 11, # 8 p. 778 - 782

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Citation Number: 6

Abstract

The one-pot hydroformylation–cyclization of allylbenzene derivatives by the catalyst system Rh (CO) 2acac/ultranox626/CO/H2/CH2Cl2 led chemoselectively to 5, 6- dihydronaphthalene derivatives 5a–d in good yields. The addition of a catalytic amount of H3PO4 enhanced in situ the cyclization process via the nucleophilic attack on the carbonyl group of the linear aldehyde, and finally the elimination of alcohol. The type of substitution ...