A New Synthesis of 2-(6-Metboxycarbonylhexyl)-cyclopent-2-en-1-one

Abstract
A new, simple and short route to 2-(6-methoxycarbonylhexyl)-cyclopent-2-en-1-one(overall yield: 33%) starting from ethyl-10-undecenoate is reported. The main feature of this synthesis is a new cobalt-catalyzed carbonylation of the intermediate epoxide, which occurs with satisfactory yield under very mild conditions.

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