Abstract
Herein, we developed secondary-alcohol-selective C-H alkylation of 1,3-butane diol by combining an acridinium photoredox catalyst and a thiophosphoric acid hydrogen atom transfer (HAT) catalyst. The use of non-coordinating solvent such as dichloromethane (DCM) improved secondary α-alkoxy C-H selectivity by lowering bond dissociation energy (BDE) through intramolecular hydrogen bonding.
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