which otherwise are essentially reluctant towards F‐nucleoplilic addition, now readily participate in this fluoroallylation reaction. Furthermore, this strategy provides an elegant example for the generation, as well as functionalization, of α‐CF3‐substituted benzylic radical intermediates using cheap and readily available starting materials.
Cu/sulfoxide phosphine (SOP) complex catalyzed nucleophilic addition of fluorinated enolates to gem-difluoroalkenes. The enantioenriched vicinal difluorides, containing a chiral tertiary fluoride and a fluoroalkene, were successfully afforded via C–C bond formation in good yields (up to 94% yield), high Z/E-selectivity (5:1 → 50:1 for Z-isomer), and excellent enantioselectivities (up to 98.5:1.5 er). Utility
在这里,我们描述了第一个对映选择性 Cu/亚砜膦 (SOP) 配合物催化氟化烯醇化物与偕二氟烯烃的亲核加成。含有手性叔氟化物和氟代烯烃的对映体富集的连二氟化物通过 C-C 键的形成成功地提供了良好的产率(高达 94% 的产率),高Z / E选择性(5:1 → 50:1 for Z -异构体)和出色的对映选择性(高达 98.5:1.5 er)。通过对复杂的生物活性化合物的修饰证明了这种方法的实用性。
AgF-Mediated Fluorinative Cross-Coupling of Two Olefins: Facile Access to α-CF<sub>3</sub>Alkenes and β-CF<sub>3</sub>Ketones
作者:Bing Gao、Yanchuan Zhao、Jinbo Hu
DOI:10.1002/anie.201409705
日期:2014.11.12
A AgF‐mediated fluorination with a concomitant cross‐coupling between a gem‐difluoroolefin and a non‐fluorinated olefin is reported. This highly efficient method provides facileaccess to both α‐CF3 alkenes and β‐CF3 ketones, which otherwise remain challenging to be directly prepared. The application of this method is further demonstrated by the synthesis of bioactive isoxazoline derivatives. This
Nickel-Catalyzed Cross-Electrophile Coupling Reactions for the Synthesis of <i>gem</i>-Difluorovinyl Arenes
作者:Baojian Xiong、Ting Wang、Haotian Sun、Yue Li、Søren Kramer、Gui-Juan Cheng、Zhong Lian
DOI:10.1021/acscatal.0c03993
日期:2020.11.20
A nickel-catalyzed cross-electrophile couplingreaction between (hetero)aryl bromides and 2,2-difluorovinyl tosylate is presented. This protocol provides facile incorporation of the gem-difluorovinyl moiety in organic molecules. The method features mild reaction conditions, good functional group tolerance, and excellent yields. Furthermore, mechanistic experiments and DFT studies indicate a Ni(0)/Ni(II)
2,2-Difluorovinyl Pinacolborane - A New Versatile Reagent for the Suzuki-Miyaura Reaction
作者:Oleksandr P. Blahun、Mykhailo O. Redka、Zoia V. Voitenko、Andrii I. Kysil、Alexey V. Dobrydnev、Oleksandr O. Grygorenko
DOI:10.1002/ejoc.201901118
日期:2019.10.9
Multigram preparation and Suzuki–Miyaura reactions of a novel fluorinated reagent for the synthesis of gem‐difluorostyrenes, their heterocyclic analogues, as well as gem‐difluorodienes – 2,2‐difluorovinyl pinacolborane – is described.