various cis-2,3-diacetoxylated piperidines. On the other hand, tetrahydroisoquinoline derivatives gave various α-C−H functionalized products in the presence of PhI(OAc)2. Nitroalkanes, dialkyl malonates, and β-keto ester are active participants in this couplingreaction. Meanwhile, α-amino nitriles can also be obtained by oxidativecoupling of amines with malononitrile.
Selective Cross-Dehydrogenative Coupling of N-Phenyltetrahydroisoquinolines in Aqueous Media Using Poly(Aniline Sulfonic Acid)/Gold Nanoparticles
作者:Toshikazu Hirao、Toru Amaya、Tsubasa Ito
DOI:10.3987/com-12-s(n)71
日期:——
Selective cross-dehydrogenative coupling of N-phenyltetrahydroisoquinoline with carbon nucleophiles such as dimethyl malonate, ethyl acetoacetate, and nitromethane was demonstrated in complete aqueous media using poly(2-methoxyaniline-5-sulfonic acid)/gold nanoparticles under molecular oxygen.
Platinum-catalyzed cross-dehydrogenative coupling reaction in the absence of oxidant
A third strategy for cross-dehydrogenative coupling reaction has been reported via platinum-catalyzed sp3 C–H and sp3 C–H coupling reaction in the absence of oxidant. Nitroalkanes as well as dialkyl malonate derivatives, β-keto esters and malononitrile are active participants in this coupling reaction. Both cyclic and acyclic non-activated simple ketones are good reactants in this reaction.