An efficient synthetic route to chiral 4-alkyl-1,2,3,4-tetrahydroquinolines: enantioselective synthesis of (R)-4-ethyl-1,2,3,4-tetrahydroquinoline

Add time:07/18/2019    Source:sciencedirect.com

An efficient synthetic route to non-racemic chiral 4-alkyl-1,2,3,4-tetrahydroquinoline is described. (4R)-4-Ethyl-1,2,3,4-tetrahydroquinoline was obtained by the organoaluminum promoted modified Beckmann rearrangement involving the oxime sulfonate of (3R)-3-ethylindan-1-one. The required optically active indanone was obtained via an asymmetric conjugate reduction of (E)-ethyl 3-phenylpent-2-enoate.

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