Photocatalytic Desulfonylative Homocoupling of Benzylic Sulfone Derivatives
作者:Masakazu Nambo、Cathleen M. Crudden、Ryusei Ohkura、Motoo Ohtsuka、Jacky C.-H. Yim
DOI:10.1055/a-1942-5695
日期:2023.1
A desulfonylative homocoupling of benzylic sulfonederivatives through a photoredox Ir catalyst is described. The 3,5-bis(trifluoromethyl)phenyl group is an effective substituent on sulfonyl group in this reaction, providing the structurally diverse multiply arylated ethanes in good yields. The α-deuterated or α-fluorinated sulfones, which can be readily prepared by α-functionalization, were also applicable
描述了通过光氧化还原 Ir 催化剂对苄基砜衍生物进行脱磺酰化同偶联。在该反应中,3,5-双(三氟甲基)苯基是磺酰基上的有效取代基,以良好的收率提供结构多样的多芳基化乙烷。α- 氘代或 α- 氟化的砜,可以很容易地通过 α 官能化制备,也适用,突出了合成药用重要结构的途径。
N-Fluorobis[(perfluoroalkyl)sulfonyl]imides: reactions with some olefins via .alpha.-fluoro carbocationic intermediates
作者:Darryl D. DesMarteau、Ze Qi Xu、Michael Witz
DOI:10.1021/jo00028a042
日期:1992.1
N-Fluorobis(perfluoroalkyl)sulfonyl]imides are a new class of electrophilic fluorinating agents. Reaction of (CF3SO2)2NF (1) with olefins gave various products, depending on the reaction conditions and the structure of the substrate. In solvents of higher nucleophilicity such as H2O, acetic acid, aqueous HCl, and (HF)(n)Py, alpha-fluorohydrins or their acetates, alpha,beta-chlorofluoro- and alpha,beta-difluoroalkanes were obtained. In acetic acid, trans-stilbene and tetraphenylethylene produced the rearranged, nonfluorinated aldehyde and ketone. Evidence is presented for the reactions proceeding via a one-electron transfer mechanism involving alpha-fluorocarbocationic intermediates.
Zupan, Marko; Metelko, Maja; Stavber, Stojan, Journal of the Chemical Society. Perkin transactions I, 1993, # 22, p. 2851 - 2856
作者:Zupan, Marko、Metelko, Maja、Stavber, Stojan
DOI:——
日期:——
Rearrangement of Phenylethenes on Reaction with Iodine−Xenon Difluoride
作者:Timothy B Patrick、Suntian Qian
DOI:10.1021/ol006450d
日期:2000.10.1
Phenyl-substituted ethenes react with iodine and xenon difluoride to provide difluorinated products. Iodofluoro intermediates react with xenon difluoride to produce transient iodine difluoride species that lose IF and F(-) and produce carbocations.