Expanding the scope of the Cu assisted Suzuki–Miyaura reaction
摘要:
Recent advances in the development of the copper facilitated Suzuki-Miyaura reaction are described. Improvements include expansion of substrate scope to include aryl chlorides and polyhalo aryl boronates. It was found that use of S-Phos and X-Phos could accomplish the coupling of 2-pyridyl boronates to aryl chlorides and bromides in shorter reaction times and in higher yield than previously described with DPPF. (C) 2011 Elsevier Ltd. All rights reserved.
The subject invention relates to novel P2X
3
receptor antagonists that play a critical role in treating disease states associated with pain, in particular peripheral pain, inflammatory pain, or tissue injury pain that can be treated using a P2X
3
receptor subunit modulator.
The subject invention relates to novel P2X3 receptor antagonists that play a critical role in treating disease states associated with pain, in particular peripheral pain, inflammatory pain, or tissue injury pain that can be treated using a P2X3 receptor subunit modulator.
Copper-Facilitated Suzuki Reactions: Application to 2-Heterocyclic Boronates
作者:James Z. Deng、Daniel V. Paone、Anthony T. Ginnetti、Hideki Kurihara、Spencer D. Dreher、Steven A. Weissman、Shaun R. Stauffer、Christopher S. Burgey
DOI:10.1021/ol802556f
日期:2009.1.15
The palladium-catalyzed Suzuki-Miyaura reaction has been utilized as one of the most powerful methods for C-C bond formation. However, Suzuki reactions of electron-deficient 2-heterocyclic boronates generally give low conversions and remain challenging. The successful copper(l) facilitated Suzuki coupling of 2-heterocyclic boronates that is broad in scope Is reported. Use of this methodology affords greatly enhanced yields of these notoriously difficult couplings. Furthermore, mechanistic investigations suggest a possible role of copper in the catalytic cycle.