Oxidant-dependent Cu-catalyzed alkynylation and aminomethylation: C–H versus C–C cleavage in TMEDA
摘要:
Oxidant-dependent Cu-catalyzed alkynylation and aminomethylation reactions have been achieved under facile and mild conditions. TMEDA coupled with various terminal alkynes via C-H bond cleavage in good yields using atmospheric oxygen as an oxidant. Switching from air to TBHP afforded aminomethylation products of terminal alkynes through C-C bond cleavage of TMEDA. The protocol provided a novel strategy to prepare bi/tridentate N-ligand. (C) 2013 Elsevier Ltd. All rights reserved.
Consecutive CH Functionalization Reactions of Arenes: Synthesis of Carbo- and Heteropolycyclic Skeletons
作者:Samuel Suárez-Pantiga、David Palomas、Eduardo Rubio、José M. González
DOI:10.1002/anie.200902989
日期:2009.10.5
Doubling the bet: Two CH bonds become functionalized upon exposure of ω‐aryl propargylic tosylates to Sc(OTf)3 (see scheme). The reaction involves a new domino process that can tolerate both electron‐withdrawing and ‐donating substituents on the arene unit. Different carbo‐ and heterocyclic frameworks can be assembled by using this approach to formally conquer the hydroarylation process.