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Enantioselective synthesis in a new light: The template-controlled [2+2] photocycloaddition leading to product 1 is the first example of this type of reaction in natural product synthesis. In addition, a retro-benzilic acid rearrangement (→2), a Claisen rearrangement (→3), and a ring-closing metathesis played decisive roles in the synthesis of the alkaloid (+)-meloscine (4).
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Selig et al. (2008) studied this question.
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