二噻吩环烷用作标题化合物的前体。对二硫杂环戊烷进行的构象研究表明,其三联苯单元具有一种独特的现象:一个环被牢固地固定,另一个末端环受到自由旋转,而中心环显示出受限的迁移性。联苯单元的芳族质子都被二氢py单元屏蔽,并在1 H NMR光谱中得到很好的分辨,这与环电流效应扩展到远离二氢py分子平面的八个共轭碳原子一致。
Expanding the scope of the Cu assisted Suzuki–Miyaura reaction
作者:Brendan M. Crowley、Craig M. Potteiger、James Z. Deng、Christopher K. Prier、Daniel V. Paone、Christopher S. Burgey
DOI:10.1016/j.tetlet.2011.07.088
日期:2011.9
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.