Halofluorination of Alkenes Using Dilute Hydrofluoric Acid
作者:Manabu Kuroboshi、Tamejiro Hiyama
DOI:10.1246/bcsj.68.1799
日期:1995.7
Iodofluorination of alkenes was achieved with N-iodosuccinimide, potassium hydrogendifluoride, and 1 M hydrofluoric acid using tetrabutylammonium fluoride as a phase-transfer catalyst. The active fluorinating reagent was shown to be tetrabutylammonium dihydrogentrifluoride by preparing the salt in a different way and by effecting the same transformation under anhydrous conditions. Bromofluorination
使用四丁基氟化铵作为相转移催化剂,用 N-碘代琥珀酰亚胺、二氟化氢钾和 1 M 氢氟酸实现烯烃的碘氟化。通过以不同的方式制备盐并在无水条件下进行相同的转化,活性氟化试剂显示为四丁基二氟化氢铵。烯烃的溴氟化也使用 1,3-二溴-5,5-二甲基乙内酰脲进行。用 DBU 处理 I-F 加合物可立体定向地提供氟烯烃。
Regioselective vicinal functionalization of unactivated alkenes with sulfonium iodate(<scp>i</scp>) reagents under metal-free conditions
作者:Dodla S. Rao、Thurpu R. Reddy、Kalvacherla Babachary、Sudhir Kashyap
DOI:10.1039/c6ob01179a
日期:——
Metal-free, molecular iodine-free direct 1,2-difunctionalization of unactivated alkenes has been reported. The sulfoniumiodate(I) reagent efficiently promoted the intermolecular vicinal iodo-functionalization of a diverse range of olefins in a stereo and regioselective manner. This method enables the divergent and straightforward preparation of synthetically useful functionalities; β-iodocarboxylates
Triiodoisocyanuric acid: a new and convenient reagent for regioselective coiodination of alkenes and enolethers with oxygenated nucleophiles
作者:Rodrigo da S. Ribeiro、Pierre M. Esteves、Marcio C.S. de Mattos
DOI:10.1016/j.tetlet.2007.10.011
日期:2007.12
The reaction of triiodoisocyanuric acid (prepared from I2 and trichloroisocyanuric acid in 90% yield) with alkenes in the presence of oxygenated nucleophilic solvents (alcohols, AcOH and H2O) led to the corresponding β-iodoethers, β-iodoacetates and iodohydrins, in 66–98% isolated yield. Enolethers reacted with triiodoisocyanuric acid in MeOH to produce dialkylacetals (70–83%).
The reaction of carbonyl compounds with diiodomethane in the presence of samarium: Novel syntheses of iodohydrins and cyclopropanols
作者:Tsuneo Imamoto、Toshiaki Takeyama、Hiroyasu Koto
DOI:10.1016/s0040-4039(00)84764-4
日期:1986.1
The iodomethylation of carbonyl compounds giving iodohydrins has been achieved under ordinary conditions by the use of diiodomethane and samarium. A novel synthesis of cyclopropanols from α-haloketones or 1,2-dibenzoylethane is also described.