1,6-Conjugate-Addition-Induced [2 + 1] Annulation of -Quinone Methides and Pyrazolones: Synthesis of Bis-Spiro Compounds with Contiguous Quaternary Spiro-Centers.
Abstract
A diastereoselective formal 1,6-conjugate-addition-mediated [2 + 1] annulation reaction using -quinone methides and pyrazolones has been described. The corresponding bis-spiro[cyclohexadienone-cyclopropane-pyrazolone] compounds were obtained in very good yield under mild reaction conditions.
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64660
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kale201916conjugateadditioninducedorganic
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64660
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10.1021/acs.orglett.9b02641
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