Readily available P-tBu substituted Li/Cl phosphinidenoidcomplexes react with carbonyl compounds to furnish sterically almost unhindered oxaphosphirane complexes that reveal new and surprisingly facile intra- and intermolecular ring expansion reactions. 1,3,2-Dioxaphosphole complex formation is explained by DFT calculations through diastereoselective carbonyl group-induced ring cleavage of an oxaphosphirane
现成的P - t Bu取代的Li / Cl膦基类固醇络合物与羰基化合物反应,可提供空间几乎不受阻碍的氧杂磷杂环戊烷络合物,从而揭示了新的且出乎意料的分子内和分子间环膨胀反应。通过非对映选择性羰基基团诱导的氧杂膦烷中间体的环裂解,通过DFT计算来解释1,3,2-二氧杂磷杂环戊烯络合物的形成。