One-Pot Photomediated Giese Reaction/Friedel–Crafts Hydroxyalkylation/Oxidative Aromatization To Access Naphthalene Derivatives from Toluenes and Enones
γ-aryl ketones and naphthalenes, were conveniently synthesized from readily available toluenes and enones through the synergistic combination of photoredox and Lewis acid catalysis. The direct synthesis of γ-aryl ketones represents a rare example of Giese reactions between benzylic C(sp3)–H and enones that avoids the use of prefunctionalized metallic nucleophiles. Naphthalene derivatives were accessed
Ground-State Electron Transfer as an Initiation Mechanism for Biocatalytic C–C Bond Forming Reactions
作者:Haigen Fu、Heather Lam、Megan A. Emmanuel、Ji Hye Kim、Braddock A. Sandoval、Todd K. Hyster
DOI:10.1021/jacs.1c04334
日期:2021.6.30
The development of non-natural reactionmechanisms is an attractive strategy for expanding the synthetic capabilities of substrate promiscuous enzymes. Here, we report an “ene”-reductase catalyzed asymmetric hydroalkylation of olefins using α-bromoketones as radical precursors. Radical initiation occurs via ground-state electrontransfer from the flavin cofactor located within the enzyme active site