6840-11-5Relevant articles and documents
(S)-4-tert-Butyl-2-phenyl-2-oxazoline derived palladacycles as efficient catalysts for the decomposition of P=S pesticides
Lu, Zhong-Lin,Yang, Xiao-Sheng,Guo, Zhi-Fo,Wang, Rui-Yao
, p. 2659 - 2672 (2010)
Three palladacycles with N, N-trans coordination, (S)-{2-[2-(4-tert-butyl) oxazolinyl]phenyl-C1, N}(4-R-pyridine)(aqua)npalladium(II) triflate (R = CF 3, n = 1, 1; R = H, n = 0, 2; R = NMe2, n = 1, 3), have been prepared from the respective chloride precursors and were characterized with IR and 1H-NMR and elemental analyses. The crystal structures of 2 and a pincer complex (S, S)-{2, 6-bis[2-(4-iso-propyl)oxazolinyl]phenyl-N, C1, N}bromo-palladium(II) hydrate (5) were determined. For methanolysis of P=S pesticides, it was found that ortho-palladated complexes 1-3 effectively catalyzed the reaction; however, the pincer complex 4 with triflate counterion was much less active. Relative to the methoxide-promoted background reaction at ssPH 10.80, 1 mmol L-1 of palladacycles 1-3 can accelerate the methanolysis by 8.7 × 109, 1.5 × 10 9, and 1.0 × 108-fold, respectively. For racemic P=S pesticides, such as letophos and EPN, it proved that there is no clear chiral discrimination during the catalysis. The reaction mechanism of the catalytic methanolysis was discussed according to the experimental results.
Enantiopure O-substituted phenylphosphonothioic acids: Chiral recognition ability during salt crystallization and chiral recognition mechanism
Kobayashi, Yuka,Morisawa, Fumi,Saigo, Kazuhiko
, p. 606 - 615 (2007/10/03)
The chiral recognition ability of enantiopure O-methyl, O-ethyl, O-propyl, and O-phenyl phenylphosphonothioic acids (1a-d) for various kinds of racemic amines during salt crystallization and the chiral recognition mechanism were thoroughly investigated. T
O,O-Dialkyl Thiophosphoro- and O-Alkyl Phenylthiophosphono-cyanidates: Synthesis and Reactions
Das, Sushanta K.,Balasubrahmanyam, S. N.
, p. 254 - 256 (2007/10/02)
The title compounds (2a-d) have been prepared by the reactions of the corresponding chloridates (1a-d) with potassium cyanide in a two-phase system (dichloromethane-water) in the presence of cetyltrimethylammonium bromide.An unexpected facile conversion of these cyanidates (2a-d) into O,O,O-trialkyl thiophosphates (5a) or O,O-dialkyl phenyl thiophosphonates (5b) has been observed in the presence of aqueous alcoholic potassium hydroxide.
