-promoted protocol for the selective and controllable esterification of P(O)OH compounds using O-nucleophiles (alcohols and phenols) as efficient esterification reagents is described. This method features a high efficiency and good functional-group tolerance, meaning a simple way to synthesize a broad spectrum of phosphinic and phosphoric acid esters from basic starting materials with moderate to excellent
Manganese-Mediated Intermolecular Arylation of<i>H</i>-Phosphinates and Related Compounds
作者:Olivier Berger、Jean-Luc Montchamp
DOI:10.1002/chem.201404507
日期:2014.9.22
intermolecular radical functionalization of arenes with aryl and alkyl H‐phosphinate esters, as well as diphenylphosphine oxide and H‐phosphonate diesters, is described. The novel catalytic MnII/excess MnIV system is a convenient and inexpensive solution to directly convert Csp2H into CP bonds. The reaction can be employed to functionalize P‐stereogenic H‐phosphinates since it is stereospecific. With
A new type of Atherton-Todd reaction for a convenient pseudohalogenation of phosphites has been developed. Direct azidation, cyanation, and thiocyanation of (RO)2P(O)H (R = Et, i-Bu, Ph) were accomplished readily with sodium pseudohalides in acetonitrile under mild modified Atherton-Todd conditions. The corresponding phosphorochloridates were demonstrated by GC/MS to be the intermediates. Pseudohalogenations of ethyl phenylphosphinate and diphenylphosphine oxide were also investigated.
开发了一种用于膦酸酯便捷伪卤化的Atherton-Todd反应新类型。在温和改良的Atherton-Todd条件下,通过乙腈中的钠伪卤化物,(RO)2P(O)H(R = Et, i-Bu, Ph)的直接叠氮化、氰化和硫氰化反应得以轻松完成。气相色谱/质谱(GC/MS)显示相应的磷酰氯化物是中间体。还研究了乙基苯膦酸酯和二苯基膦氧化物的伪卤化反应。
Manganese-Catalyzed and Mediated Synthesis of Arylphosphinates and Related Compounds
作者:Olivier Berger、Jean-Luc Montchamp
DOI:10.1021/acs.joc.9b01239
日期:2019.7.19
H-phosphinates and relatedcompounds was examined. A practical catalytic process with the air as the oxidant could not be found. However, an inexpensive and robust methodology was developed, using catalytic Mn(II) as the radical initiator and excess Mn(IV) as the stoichiometric oxidant. Using these conditions, the inter- and intramolecular arylation of phosphinylidene compounds has a broad scope, including