Chemoselective cross-coupling Suzuki–Miyaura reaction of (Z)-(2-chlorovinyl)tellurides and potassium aryltrifluoroborate salts
摘要:
An ultrasound-assisted synthesis of functionalized vinylic chlorides is described by palladium-catalyzed cross-coupling reaction of potassium aryltrifluoroborate salts and (Z)-2-chloro vinylic tellurides. This procedure offers easy access to vinylic chlorides architecture that contains sterically demanding groups in good yields. (C) 2008 Elsevier Ltd. All rights reserved.
Palladium(0)-Catalyzed Cross-Coupling of Potassium (<i>Z</i>)-2-Chloroalk-1-enyl Trifluoroborates: A Chemo- and Stereoselective Access to (<i>Z</i>)-Chloroolefins and Trisubstituted Alkenes
Original and ambivalent: We describe the preparation of a series of new potassiumtrifluoroborates 1, and the study of their behaviour in a Pd0‐catalyzed cross‐coupling reaction. We found that compounds 1 are endowed with original properties as they behave as nucleophilic cross‐coupling partners chemoselectively, but also as ambivalent synthons. The usefulness of this methodology has been successfully