Abstract:
The hydrostannylation of white phosphorus (P4) allows this crucial industrial precursor to be easily transformed into useful P1 products via direct, \'one pot\' (or even catalytic) procedures. However, a thorough mechanistic understanding of this transformation has remained elusive, hindering attempts to use this rare example of successful, direct P4 functionalization as a model for further reaction development. Here, we provide a deep and generalizable mechanistic picture for P4 hydrostannylation by combining DFT calculations with in situ31P NMR reaction monitoring and kinetic trapping of previously unobservable reaction intermediates using bulky tin hydrides. The results offer important insights into both how this reaction proceeds and why it is successful and provide implicit guidelines for future research in the field of P4 activation.
摘要:
白磷(P4)的氢锡化使这种关键的工业前体可以通过直接将其转化为有用的P1产品,\'一锅\'(甚至催化)程序。然而,对这种转变的彻底机械理解仍然难以捉摸,阻碍使用这个罕见的成功例子的尝试,直接P4官能化作为进一步反应发展的模型。这里,通过将DFT计算与原位31PNMR反应监测以及使用庞大的锡氢化物对以前无法观察到的反应中间体的动力学捕获相结合,我们为P4加氢锡化提供了深入且可推广的机理图。这些结果为该反应如何进行以及为什么成功提供了重要的见解,并为P4激活领域的未来研究提供了隐含的指导。