Iodo(III)-Meyer–Schuster Rearrangement of Propargylic Alcohols Promoted by Benziodoxole Triflate
作者:Roshayed Ali Laskar、Wei Ding、Naohiko Yoshikai
DOI:10.1021/acs.orglett.1c00039
日期:2021.2.5
rearrangement of propargylicalcohols into α,β-unsaturated ketones bearing an α-λ3-iodanyl group. This iodo(III)-Meyer–Schuster rearrangement proceeds under mild conditions and tolerates a variety of functionalized propargylicalcohols, thus complementing previously reported halogen-intercepted Meyer–Schuster rearrangement. The α-λ3-iodanylenones can be utilized for facile Pd-catalyzed cross-coupling for the
preparation of α-fluoroenones from propargyl acetates has been developed proceeding via a gold-catalyzed rearrangement-fluorination cascade. Control reactions are consistent with a mechanism involving a gold-mediated 3,3-sigma-tropic shift followed by a direct, nongold-catalyzed electrophilic fluorination of the allenyl acetate intermediate.