Ion−Molecule Reactions of <i>O</i>,<i>S</i>-Dimethyl Methylphosphonothioate: Evidence for Intramolecular Sulfur Oxidation during VX Perhydrolysis
作者:Andrew M. McAnoy、Jilliarne Williams、Martin R. L. Paine、Michael L. Rogers、Stephen J. Blanksby
DOI:10.1021/jo901944p
日期:2009.12.18
ion−molecule reactions of HOO− with O,S-dimethyl methylphosphonothioate in a modified linear ion-trap mass spectrometer. In addition to simple proton transfer, two other abundant product ions are observed at m/z 125 and 109 corresponding to the S-methyl methylphosphonothioate and methyl methylphosphonate anions, respectively. The structure of these product ions is demonstrated by a combination of collision-induced
神经剂的碱性过水解ö -乙基小号- [2-(异丙基氨基)乙基]甲基硫代(VX)通过研究HOO的离子-分子反应研究-与ö,小号中修正的线性离子阱-二甲基甲基硫代质谱仪。除了简单的质子转移外,在m / z 125和109处还观察到另外两个丰富的产物离子,对应于S-甲基甲基硫代磷酸膦酸酯和甲基甲基膦酸甲酯阴离子。这些产物离子的结构通过碰撞诱导的解离和同位素标记实验的组合得到证明,这些实验也为它们通过亲核反应途径形成的证据提供了证据,即(i)碳原子上的S N 2产生S-甲基甲基硫代磷酸酯阴离子和(ii)在磷上的亲核加成反应,形成易于反应的五价中间体,该中间体容易发生内部硫氧化并伴随CH 3的消除SOH产生甲基膦酸甲酯阴离子。与以前对VX过水解的溶液相观察一致,在该VX模型系统中未观察到有毒的P-O裂解产物,理论计算表明P-O裂解在能量上没有竞争性。相反,分子内硫的氧化被认为是极度放热的,并且在动力
Singh, Ravindra; Gutch; Acharya, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2011, vol. 50, # 10, p. 1504 - 1509
作者:Singh, Ravindra、Gutch、Acharya、Prabha
DOI:——
日期:——
Stereochemistry of some reactions between alkyl S-methyl methylphosphonothioates and chiral alkoxides
作者:C. Richard Hall、Thomas D. Inch、Colin Pottage、Nancy E. Williams
DOI:10.1016/s0040-4020(01)96731-6
日期:1985.1
te and (+)-pinacolyl alkoxide competitive and highly stereoselective displacements of O-alkyl and S-methyl occur, both reactions being with inversion of configuration. With the enantiomeric S-(-) ethyl (and methyl) S-methyl methylphosphonothioates and (+)-pinacolyl alkoxide the reactions, although still competitive, are no longer stereoselective. In contrast similar reactions with the sodium salt of
Stereochemistry of alkaline hydrolyses of 1,3,2-oxazaphospholidine-2-thiones and related reactions
作者:C. Richard Hall、Thomas D. Inch
DOI:10.1039/p19810002368
日期:——
preference to oxygen. A term, apical potentiality, introduced to refer to apical preference during reactions, is intended to be quite distinct from the term apicophilicity which describes apical preference in stable phosphoranes. S-Alkyl groups are displaced from NN-dialkyl phosphoramidothioates with retention of configuration, but with inversion in the corresponding phosphono-derivatives.