Add time:08/29/2019         Source:sciencedirect.com

Mixed trifluoroacetyl phenylacetyl anhydride and 3-halostyrenes (fluoro, chloro, and bromo) or vinylcycloalkanes (cyclohexyl and cyclooctyl), undergo cascade Friedel–Crafts cycli-acylalkylation, enolization, and O-acylation to give 4-substituted tetralen-2-ol phenylacetates, without additional solvent in good yields. Base alcoholysis of 4-phenyltetralen-2-ol phenylacetate reveals the tetral-2-one for asymmetric transfer hydrogenation. Bromophenyltetralen-2-ol phenylacetate undergoes Suzuki coupling, and provides a short route to trans-4-phenyl-β-aminotetralin.

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