Synthesis of Cp*CH2PPh2 and its use as a ligand for the nickel-catalysed cross-coupling reaction of alkyl halides with aryl Grignard reagents
作者:Minoru Uemura、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1039/b612173j
日期:——
A new ligand, Cp*CH2PPh2 (Cp* = 1,2,3,4,5-pentamethyl-2,4-cyclopentadienyl), was prepared, and was used as a ligand for nickel-catalysed cross-couplingreaction of alkylhalides with aryl Grignard reagents, which nickel-phosphine complexes had never made possible.
Harnessing Alkylpyridinium Salts as Electrophiles in Deaminative Alkyl–Alkyl Cross-Couplings
作者:Shane Plunkett、Corey H. Basch、Samantha O. Santana、Mary P. Watson
DOI:10.1021/jacs.9b00111
日期:2019.2.13
A Negishicross-coupling of alkylpyridinium salts and alkylzinc halides has been developed. This is the first example of alkyl-alkyl bond formation via cross-coupling of an alkyl amine derivative with an unactivated alkyl group, and allows both primary and secondary alkylpyridinium salts to react with primary alkylzinc halides with high functional group tolerance. When combined with formation of the
2,6-Bis(pyrazol-1-yl)pyridine (1-bpp) as a General Ligand for the Negishi Alkylation of Alkylpyridinium Salts
作者:Kristen M. Baker、Olivia P. Bercher、J. Cameron Twitty、Thomas Mortimer、Mary P. Watson
DOI:10.1021/acs.joc.3c00665
日期:——
effective in the Negishi alkylation with multiple classes of alkylpyridinium salts, including α-primary and α-secondary. These conditions are also effective for benzylic pyridinium salts, demonstrating the successful Negishi alkylation of benzylic pyridinium salts for the first time. Further, 14 derivatives of 1-bpp were prepared with a variety of steric and electronic properties to study how these changes
A convenient method for converting saturated aldehydes to .alpha.,.beta.-unsaturated aldehydes elongated by one carbon atom. The palladium(II)-promoted oxidation of methyl enol ethers