ArticleOrganic letters2026
Selective Copper-Catalyzed Cross-Coupling of Cyclopropyl and Cyclobutyl 1,2-Bis(boronates).
Article in Organic letters, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Herein we disclose an approach to perform the selective copper-catalyzed cross-coupling of 1,2-diborylcyclopropanes and cyclobutanes with different electrophiles. In the case of 1,2-diborylcyclopropanes, a simple alkoxide base was needed to promote the cross-coupling with either allyl halides, propargyl halides, alkynyl halides, or electrophilic amines, which highlights the special reactivity of these diboron compounds. In the case of 1,2-diborylspirocyclobutanes, a site-selective activation of the less hindered boron was observed. Further functionalization of the remaining boryl moiety provides access to highly functionalized stereodefined cyclopropanes and spirocyclobutanes.
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