Tetrahedron

Synthesis of indenes from phenylpropanones using alumina catalyst

M Jayamani, N Pant, S Ananthan, K Narayanan…

Index: Jayamani, M.; Pant, Nalin; Ananthan, S.; Narayanan, K.; Pillai, C. N. Tetrahedron, 1986 , vol. 42, # 15 p. 4325 - 4332

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Citation Number: 13

Abstract

1, 3-Diphenylpronan-2-one undergoes dehydration over alumina at around 400° C to form 1, 3-diphenylallene which cyclizes to 2-phenylindene. Since the parent ketone can be obtained under the reaction conditions from phenylacetic acid, the present reaction forms a one step syntheses of 2-phenylindene from phenylacetic acid. 3-and 4-methylphenylacetic acids also give the corresponding indenes. 1, 3-Diphenylpropan-1-ones also give ...

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