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An enantioselective organocatalytic intramolecular Morita-Baylis-Hillman (IMBH) reaction of dienones is reported for the first time. This has been achieved by incorporating entropy and synergy considerations during the substrate design. The reaction conditions are thoroughly verified for an efficient synthesis of highly functionalised cyclopenta-fused arenes and heteroarenes in excellent yields and enantioselectivities. The synthetic utility of the IMBH-adducts has been demonstrated by transforming them into 3,4-disubstituted fluorenones in a serendipitous manner.
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Satpathi et al. (2017) studied this question.
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