Dearomatization of (Hetero)arenes through Photodriven Interplay between Polysulfide Anions and Formate**
作者:Eugene Yew Kun Tan、Amirah S. Mat Lani、Wayne Sow、Yuliang Liu、Haoyu Li、Shunsuke Chiba
DOI:10.1002/anie.202309764
日期:2023.10.2
protocol was developed for the dearomatization of substitutednaphthalenes, indoles, and related heteroaromatic compounds through a radical-polar crossover mechanism induced by single-electron transfer from photoexcited polysulfide anions in the presence of methanol. The catalytic turnover is maintained by hydrogen-atom transfer between polysulfide radical anions and formate.
The photo-irradiation of 3, 4-bis(phenylmethyl)-2(5H)-furanone (5) in acetone or in methanol resulted in selective rearrangement of the 4-phenymethyl moiety and gave 5-phenyl-1-(phenylmethyl)-3-oxabocyclo[3.1.0]hexan-2-one (9)along with cis- and trans-3, 4-bis(phenylmethyl)dihydro-2(3H)-furanone (10a and 10b). The difference in photochemical behavior from that of β-apolignan (1) is discussed.