Reactions of Difluorocarbene with Organozinc Reagents
作者:Vitalij V. Levin、Artem A. Zemtsov、Marina I. Struchkova、Alexander D. Dilman
DOI:10.1021/ol400122k
日期:2013.2.15
Reactions of difluorocarbene with benzyl and alkylzinc halides leading to fluorinated organozinc species have been described. The generated α-difluorinated organozinc reagents are reasonably stable in solution and can be quenched with external electrophiles (iodine, bromine, proton), affording compounds containing the CF2 fragment.
Transition-Metal-Free Borylation of Alkyl Iodides via a Radical Mechanism
作者:Qianyi Liu、Junting Hong、Beiqi Sun、Guangcan Bai、Feng Li、Guoquan Liu、Yang Yang、Fanyang Mo
DOI:10.1021/acs.orglett.9b01951
日期:2019.9.6
transition-metal-free borylation of alkyliodides. This method uses commercially available diboron reagents as the boron source and exhibits excellent functional group compatibility. Furthermore, a diverse range of primary and secondaryalkyliodides could be effectively transformed to the corresponding alkylboronates in excellent yield. Mechanisticinvestigations suggest that this borylation reaction
Umpolung of B−H Bonds by Metal–Ligand Cooperation with Cyclopentadienone Iridium Complexes
作者:Takuya Higashi、Shuhei Kusumoto、Kyoko Nozaki
DOI:10.1002/anie.202011322
日期:2021.2.8
of B−H bonds by novel cyclopentadienone iridium complexes. The B−H bonds of 4,4,5,5‐tetramethyl‐1,3,2‐dioxaborolane (HBpin) and 1,8‐naphthalenediaminatoborane (HBdan) were cleaved to give a B anion on the metal and an H cation on the phenolic oxygen atom of the ligand. Mechanistic investigation by DFT calculations revealed that the alkoxycarbonyl‐substituted cyclopentadienone ligand facilitated deprotonation
Nickel‐Hydride‐Catalyzed Diastereo‐ and Enantioselective Hydroalkylation of Cyclopropenes
作者:Qingqin Huang、Ya Chen、Xueting Zhou、Lei Dai、Yixin Lu
DOI:10.1002/anie.202210560
日期:2022.11.14
The first nickel-hydride-catalyzed diastereo- and enantioselective hydroalkylation of cyclopropenes has been developed for rapid synthesis of chiral alkylcyclopropane motifs. The reaction is efficient and versatile, taking place under mild conditions, and having excellent functional group tolerance. Concise asymmetric synthesis of antidepressant drug, D-Milnacipran, was performed to demonstrate the