Rapid Assembly of Functionalized Hydrodibenzofurans via Semipinacol Rearrangements
摘要:
A distinct strategy via unprecedented semipinacol rearrangements for the synthesis of functionalized hydrodibenzofurans is reported. The versatile reactivity of benzofuran-3-one as a building block enabled the convergent coupling of simple starting materials and, thus, allowed for the facile variation of R group and the construction of hydrodibenzofurans with fused rings.
A Strategic Synthesis of Fluoroethers via Ring-Opening Fluorinative Beckmann Fragmentation
作者:Chae Yeon Lee、Su Eun Lee、Hee Nam Lim
DOI:10.1021/acs.orglett.3c02343
日期:2023.9.8
An SN1-type fluorination method for monofluoroethers is developed. The key to this reaction is fluorinative C–C bond cleavage that is driven by oxygen-assisted Beckmann fragmentation. To enable this transformation, cyclic α-aryloxyoximes derived from 3-coumaranone and 1-indanones were investigated as substrates, using N,N-diethylaminosulfur trifluoride (DAST) as a dual-role reagent of an oxime activator