Cobalt-catalyzed alkenylation of organomagnesium reagents
作者:Gérard Cahiez、Hovsep Avedissian
DOI:10.1016/s0040-4039(98)01266-0
日期:1998.8
Alkenyl iodides, bromides and chlorides react with organomagnesium reagents in THF, in the presence of Co(acac)2 and NMP (9 to 4 equiv.), to give the cross-coupling products in good yields. The reaction is chemoselective (aryl or alkyl bromides, esters and ketones) and stereoselective (≥99.5%).
[(C6H5)(3)C](+)[B(C6F5)(4)](-) effectively catalyzes the alkylmetallation of alkynes by using the alkylzirconium species, which is generated by the hydrozirconation of alkenes. (C) 1999 Elsevier Science Ltd. All rights reserved.