Cobalt-Catalyzed Csp<sup>3</sup>–Csp<sup>3</sup> Cross-Coupling of Functionalized Alkylzinc Reagents with Alkyl Iodides
作者:Ferdinand H. Lutter、Lucie Grokenberger、Maximilian Benz、Paul Knochel
DOI:10.1021/acs.orglett.0c00795
日期:2020.4.17
A mild cobalt-catalyzed Negishi-type cross-coupling of various functionalized dialkylzinc reagents with primary and secondary alkyl iodides in acetonitrile is reported using a combination of 20% CoCl2 and chelating nitrogen ligands. The method allows the construction of molecules with alkyl chains bearing sensitive functional groups at room temperature.
Nickel-Catalyzed Kumada Coupling of Benzyl Chlorides and Vinylogous Derivatives
作者:Rita Soler-Yanes、Manuel Guisán-Ceinos、Elena Buñuel、Diego J. Cárdenas
DOI:10.1002/ejoc.201403007
日期:2014.10
Kumada-type cross-coupling of functionalized benzyl and allyl chlorides with alkylmagnesium reagents were discovered. The use of Ni(acac)2–TMEDA (acac = acetylacetonate, TMEDA = N,N,N′,N′-tetramethyl-1,2-ethylenediamine) allows the presence of reactive functional groups on the electrophile. On the other hand, the use of diallyl ether was shown to provide fast coupling at low temperature with a low catalyst
发现了功能化苄基和烯丙基氯与烷基镁试剂的快速 Ni 催化 KumaDA 型交叉偶联的条件。Ni(acac)2-TMEDA(acac = 乙酰丙酮化物,TMEDA = N,N,N',N'-四甲基-1,2-乙二胺)的使用允许在亲电子试剂上存在反应性官能团。另一方面,二烯丙基醚的使用显示出在低温下以低催化剂负载提供快速偶联。该反应似乎遵循一个激进的途径。
SHINER, CHRISTOPHER S.;TSUNODA, TETSUTO;GOODMAN, BURTON A.;INGHAM, STEPHE+, J. AMER. CHEM. SOC., 111,(1989) N, C. 1381-1392
作者:SHINER, CHRISTOPHER S.、TSUNODA, TETSUTO、GOODMAN, BURTON A.、INGHAM, STEPHE+