Conversion of Carbamates to Amidosulfones and Amides. Synthesis of the [14C]-Labeled Antiobesity Agent Ro23-7637.
摘要:
[GRAPHICS]Carbamates of primary and secondary amines react with the dianion of methyl phenyl sulfone to yield amidosulfones. Alylation of the amidosulfone followed by reductive removal of the sulfonyl residue gives an amide.
Enantio- and Regioselective CuH-Catalyzed Hydroamination of Alkenes
作者:Shaolin Zhu、Nootaree Niljianskul、Stephen L. Buchwald
DOI:10.1021/ja4092819
日期:2013.10.23
enantio- and regioselectivecopper-catalyzedhydroamination reaction of alkenes has been developed using diethoxymethylsilane and esters of hydroxylamines. The process tolerates a wide variety of substituted styrenes, including trans-, cis-, and β,β-disubstituted styrenes, to yield α-branched amines. In addition, aliphatic alkenes coupled to generate exclusively the anti-Markovnikov hydroamination products
Copper-Catalyzed Trifluoromethylation of Unactivated Olefins
作者:Andrew T. Parsons、Stephen L. Buchwald
DOI:10.1002/anie.201104053
日期:2011.9.19
Activating the inactive: A copper‐catalyzed allylic trifluoromethylation of unactivated terminal olefins proceeds under mild conditions to produce linear allylic trifluoromethylated products with high E/Z selectivity (see scheme). The reaction can be applied to a range of substrates bearing numerous functional groups. Furthermore, the reaction is scalable and amenable to a benchtop setup.