Tf<sub>2</sub>O-Promoted Activating Strategy of Phosphate Analogues: Synthesis of Mixed Phosphates and Phosphinate
作者:Hai Huang、Jeffrey Ash、Jun Yong Kang
DOI:10.1021/acs.orglett.8b02073
日期:2018.8.17
strategy of various phosphates has been developed. This method enables the facile synthesis of functional phosphates such as alkyl phosphates, aza phosphates, thiophosphate, and mixed diaryl phosphates. A transient phosphorylpyridin-1-ium species in situ generated fromphosphates with Tf2O/pyridine readily undergoes a substitution reaction with diverse nucleophiles to form versatile phosphate compounds.
已开发出各种磷酸盐的无金属,无毒氯化物试剂的活化策略。该方法使得能够容易地合成功能性磷酸盐,例如烷基磷酸盐,氮杂磷酸盐,硫代磷酸盐和混合的二芳基磷酸盐。由具有Tf 2 O /吡啶的磷酸盐原位产生的瞬时磷酰吡啶-1-鎓物质很容易与各种亲核试剂发生取代反应,形成通用的磷酸盐化合物。
Direct Aryloxylation/Alkyloxylation of Dialkyl Phosphonates for the Synthesis of Mixed Phosphonates
作者:Hai Huang、Johanna Denne、Chou‐Hsun Yang、Haobin Wang、Jun Yong Kang
DOI:10.1002/anie.201802082
日期:2018.5.28
A strategy for the direct functionalization strategy of inertial dialkyl phosphonates with hydroxy compounds to afford diverse mixed phosphonates with good yields and functional‐group tolerance has been developed. Mechanistic investigations involving both NMR studies and DFT studies suggest that an unprecedented highly reactive PV species (phosphoryl pyridin‐1‐ium salt), a key intermediate for this