One-Step Conversion of Potassium Organotrifluoroborates to Metal Organoborohydrides
作者:Christopher M. Bateman、Hailey Beal、Joshua E. Barker、Brena L. Thompson、Drake Donovan、Bradley J. Grant、Jesse Shooter、Jordan H. Arakawa、Spencer Johnson、Caleb J. Allen、James L. Yates、Ryota Kato、Colby W. K. Tinsley、Lev. N. Zakharov、Eric R. Abbey
DOI:10.1021/acs.orglett.8b01373
日期:2018.7.6
organotrifluoroborates (KRBF3) to metal monoorganoborohydrides (MRBH3) using alkali metal aluminumhydrides. The method tolerates a variety of functional groups, expanding MRBH3 diversity. Hydride removal with Me3SiCl in the presence of dimethylaminopyridine (DMAP) affords the organoborane·DMAP (RBH2·DMAP) adducts.
Suzuki–Miyaura Cross-Coupling of Potassium Dioxolanylethyltrifluoroborate and Aryl/Heteroaryl Chlorides
作者:Nicolas Fleury-Brégeot、Daniel Oehlrich、Frederik Rombouts、Gary A. Molander
DOI:10.1021/ol400320q
日期:2013.4.5
A robust and efficient protocol for the introduction of the dioxolanylethyl moiety onto various aryl and heteroaryl halides has been developed, providing cross-coupling yields up to 93%. Copper-catalyzedborylation of 2-(2-bromoethyl)-1,3-dioxolane with bis(pinacolato)diboron followed by treatment with potassium bifluoride provides the key organotrifluoroborate reagent.
One-Pot Synthesis of [N(PPh<sub>3</sub>)<sub>2</sub>]<sup>+</sup> Monoorganoborohydride Salts from Potassium Organotrifluoroborates Yields Unusual Crystalline Compounds for X-ray Crystallography
作者:James L. Yates、Brena L. Thompson、Eugene P. Korchemniy、Benjamin A. Rooney-Sailand、Craig M. Glasser、Caleb J. Allen、Kraig A. Wheeler、Eric R. Abbey
DOI:10.1021/acs.organomet.2c00353
日期:2022.11.14
es with PPN+ [N(PPh3)2]+ cations. A reactivity study comparing PPN+-based borohydrides in CDCl3 and their Na+-containing counterparts in DMSO-d6 shows enhanced reduction ability toward aldehydes and ketones in the metal-free reactions, as well as greater atmospheric stability. Many of these compounds form crystals suitable for crystallographic assessment. Eight new X-raystructures are analyzed herein