Cobalt-Catalyzed Defluorosilylation of Aryl Fluorides via Grignard Reagent Formation
作者:Soobin Lim、Hyungdo Cho、Jongheon Jeong、Minjae Jang、Hyunseok Kim、Seung Hwan Cho、Eunsung Lee
DOI:10.1021/acs.orglett.0c02752
日期:2020.9.18
cheap electrophilic silicon source with magnesium. This method is compatible with various silicon sources and can be operated under aerobic conditions. Mechanistic studies support the in situ formation of a Grignard reagent, which is captured by the electrophilic silicon source.
functionalized diheteroaryl and diaryl ketones was developed using Ru-catalysts of minimal stereogenicity. Various ketone substrates with structurally and electronically similar groups attached to the prochiral centers were reduced successfully in good to excellent enantioselectivities and yields. This protocol provides practical and efficient access to chiral diheteroarylmethanols and benzhydrols,
Cobalt-Catalyzed Formation of Grignard Reagents <i>via</i> C–O or C–S Bond Activation
作者:Ewa Pietrasiak、Seongmin Ha、Seungwon Jeon、Jongheon Jeong、Jiyeon Lee、Jongcheol Seo、Eunsung Lee
DOI:10.1021/acs.joc.2c00221
日期:2022.7.1
catalyzed by cobalt(II) chloride in combination with a nacnac-type ligand and magnesium as a reductant is reported. Borylation and benzoylation of aryl methoxides are demonstrated, and C(aryl)–SMe bond borylation can be achieved under similar conditions. This is the first example of achieving these transformations using cobalt catalysis. Mechanistic studies suggest that a Grignard reagent is generated
Scholl; Seer, Justus Liebigs Annalen der Chemie, 1912, vol. 394, p. 153
作者:Scholl、Seer
DOI:——
日期:——
STUDIES ON MOLECULAR-REARRANGEMENTS OF α-GLYCOLS. VIII. REDUCTION OF αβ-DINAPHTHYL KETONE (AN ATTEMPT TO COMPARE THE ELECTRO NEGATIVITIES OF α- AND β- NAPHTHYL RADICALS)