Effect of anomalous aryl strengthening in the series of N-phosphorylureas
摘要:
Within the series of model N-diorganophosphoryl-N'-n-octylureas, the ability to extract uranium(VI) from nitric acid solutions is maximal for N-diphenylphosphoryl derivative and sharply decreases when phenyl groups are replaced with n-alkyl or cycloalkyl substituents; this indicates the presence of 'anomalous aryl strengthening' effect also in the series of N-phosphorylureas, a new promising class of organophosphorus extractants.
The Reactions of Dialkyl Phosphites and Phosphine Oxides with Iodosylbenzene
作者:Sławomir Makowiec、Janusz Rachon
DOI:10.1080/10426500210674
日期:2002.4.1
The reaction of iodosylbenzene with >P(O)H type of acids (dialkylphosphites, secondary phosphine oxides) was studied. The acids of >P(O)H type add to iodosylbenzene to yield intermediate 6 which in the aprotic solvents yields oxidation products, it means >P(O)OH acids and/or anhydride of >P(O)OP(O)< type. On the other hand if the reaction is performed in alcohol as a solvent in the presence of sodium
Direct, oxidative halogenation of diaryl- or dialkylphosphine oxides with (dihaloiodo)arenes
作者:Jasmin Eljo、Graham K. Murphy
DOI:10.1016/j.tetlet.2018.06.044
日期:2018.8
The oxidative halogenation of diaryl- or dialkylphosphine oxides with the hypervalent iodine reagents (difluoroiodo)toluene (p-TolIF2, 1) and (dichloroiodo)benzene (PhICl2, 2) is reported. Phosphoric fluorides could be recovered in 32–75% yield, or they could be trapped with EtOH to give the corresponding phosphinate in typically good yield. Phosphoric chlorides were not readily isolable, and were
Reactivity of diacyloxyiodobenzenes toward trivalent phosphorus nucleophiles
作者:S?awomir Makowiec、Janusz Rachon
DOI:10.1002/hc.10161
日期:——
equiv of sodium diisopropyl phosphite in THF produces diisopropyl 1-(diisopropoxyphosphinyl)ethylphosphonate with excellent yield. It was found that diacyloxyiodobenzene/PR3 system may serve as an acylating agent; the acylation process can proceed via carboxylic acid anhydride or acylphosphonium salt 17 depending on the protocol used. New very efficient method for synthesis of 2,4,6-trimethylbenzoic
consistent with 5-coordinate tin for triorganotin diorganophosphinates, (I); both 4- and 5-coordinate tin for bis(triorganotin) organophosphonates, (II); 5-coordinate tin for poly(diorganotin organophosphonates), (III); and 6-coordinate tin for diorganotin bis(diorganophosphinates), (IV). Structures are proposed on the basis of molecularity, infrared, NMR, and Mössbauer data.