Mechanistic Investigation of the Pd-Catalyzed Intermolecular Carboetherification and Carboamination of 2,3-Dihydrofuran: Similarities, Differences, and Evidence for Unusual Reaction Intermediates
作者:Gustavo M. Borrajo-Calleja、Vincent Bizet、Céline Besnard、Clément Mazet
DOI:10.1021/acs.organomet.7b00483
日期:2017.9.25
interaction was found to facilitate coordination of the polarized olefinic substrate, as evidenced by NMR spectroscopy. In contrast, coordination of the pendant sulfonyl group in the cationic complexes derived from 2-bromo-N-sulfonylated anilines prevented direct binding of 2,3-dihydrofuran. Deprotonation of these species induced aggregation of monomeric units through various weak noncovalent int...
实验研究了Pd催化2,3-二氢呋喃分子间顺碳醚化和顺碳胺化的机理。晶体学、光谱学和光谱学方法揭示了许多具有催化能力的钯配合物的性质。几种氧化加成配合物及其阳离子衍生物已通过 X 射线衍射分析进行了表征。在后者中,衍生自 2-溴苯酚的配合物显示出特殊的 Buchwald 型二烷基联芳基膦配体的非正统 η6 结合模式。正如 NMR 光谱所证明的那样,发现这种相互作用的半相容性有助于极化烯烃底物的配位。相比之下,由 2-溴-N-磺酰化苯胺衍生的阳离子配合物中的磺酰基侧基的配位阻止了 2,3-二氢呋喃的直接结合。这些物种的去质子化通过各种弱非共价键诱导单体单元的聚集...