Abstract：
A series of luminescent, neutral pentacoordinate dithieno[3,2-b:2\',3\'-d]phosphole compounds was synthesized by [4+1] cycloaddition of o-quinones with the corresponding trivalent phospholes. The electronic and geometrical modification of the π-conjugated scaffold implemented here impacts the aggregation behavior of the species in solution. It proved successful in generating species with improved Lewis acidity of the phosphorus center that was then leveraged for small-molecule activation. Hydride abstraction from an external substrate involving the hypervalent species is followed by an intriguing P-mediated umpolung from the hydride to a proton and supports the catalytic potential of this class of main-group Lewis acids for organic chemistry. This study is a comprehensive investigation into various methods, including electronic, chemical, geometric modifications (and sometimes combinations of these approaches) to systematically improve the Lewis acidity of neutral and stable main-group Lewis acids with practical value for a range of chemical transformations.
摘要：
一系列的发光，中性五配位二噻吩并[3,2-b:2\'，通过邻醌与三价相应的磷孔的[41]环加成合成了3\'-d]磷孔化合物。此处实施的π共轭支架的电子和几何修饰会影响溶液中物种的聚集行为。事实证明，它成功地产生了磷中心Lewis酸度得到改善的物种，然后将其用于小分子活化。从涉及高价物种的外部底物中提取氢化物，然后从氢化物到质子进行有趣的P介导的升迁，并支持该类主族路易斯酸对有机化学的催化潜力。这项研究是对各种方法的全面调查，包括电子、化学,几何修饰（有时是这些方法的组合），以系统地改善中性和稳定的主族路易斯酸的路易斯酸，具有对一系列化学转化的实用价值。
