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Synthesis of fluorenyl alcohols via cooperative palladium/norbornene catalysis†
Alessandra Casnati,Marco Fontana,Elena Motti,Nicola Della Ca’
Organic & Biomolecular Chemistry Pub Date : 06/06/2019 00:00:00 , DOI:10.1039/C9OB01085H
Abstract

Herein, we report a novel catalytic synthesis of substituted 9H-fluoren-9-ols starting from aryl iodides and secondary ortho-bromobenzyl alcohols in the presence of palladium/norbornene as a catalytic system. The present protocol exhibits high functional group tolerance, mild reaction conditions and moderate to good yields. This transformation is based on two sequential pathways: (i) Pd(II)-mediated oxidation of the secondary alcohol to the corresponding ketone and (ii) Pd(0)/norbornene-catalyzed reaction of the in situ generated ortho-bromoacetophenone with the aryl iodide.

Graphical abstract: Synthesis of fluorenyl alcohols via cooperative palladium/norbornene catalysis
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