- Unexpected Z/E isomerism of N-methyl-O-phosphothioyl benzohydroxamic acids, their oxyphilic reactivity and inertness to amines
-
Thiophosphinoylation of N-methyl p-substituted benzohydroxamic acids using disulfanes (method A) or diphenylphosphinothioyl chloride (method B) provides only one conformer of the respective O-phosphothioyl derivative (X-ray and NMR analysis). Undergoing t
- Majewski, Arkadiusz,Chojnacki, Jaros?aw,Przychodzeń, Witold
-
p. 1077 - 1091
(2021/01/11)
-
- A practical method for N-alkylation of phosphinic (thio)amides with alcohols via transfer hydrogenation
-
This manuscript describes a modular method for preparing N-alkyl phosphinic amides from primary or secondary alcohols and primary phosphinic amide (R1R2P = ONH2) nucleophiles via transfer hydrogenation. The transformation typically proceeds in excellent yields, employs conveniently available reagents, and produces water as the only byproduct.
- Jankins, Tanner C.,Qin, Zi-Yang,Engle, Keary M.
-
p. 3272 - 3281
(2019/05/15)
-
- New mixed-donor unsymmetrical P-N-P ligands and their palladium(II) complexes
-
Unsymmetrical bidentate ligands R2P(E)-N(H)-P(E′)R′2 [R, R′ = Ph, OPh, iPr; E, E′ = O, S, Se] have been synthesised using the condensation reaction of an amino compound, R2P(E)NH2 [R = PhO, Ph; E = O, S, Se], with a phosphorus electrophile, R′2P(E′)C1 [R′ = iPr, Ph, OPh; E′ = O, S, Se]. Deprotonated ligands (with KOtBu) can be treated with Pd(OAc)2 to give [Ph2P(S)-N-P(O)(OPh)2]2Pd, [iPr2P(S)-N-P(O)(OPh)2]2Pd and [Ph2P(S)-N-P(S)(OPh)2]2Pd, which show either four-membered or six-membered chelate rings. The new compounds were studied spectroscopically (NMR, IR and Raman) and by X-ray crystallography.
- Necas,Foreman,Marek,Woollins,Novosad
-
p. 1256 - 1263
(2007/10/03)
-
- N-(diphenylphosphinothioyl)hydroxylamine: Preparation, characterisation and base-induced transposition of sulfur and oxygen atoms in its O-benzoyl derivative
-
N-(Diphenylphosphinothioyl)hydroxylamine 5 has been prepared from Ph2P(S)Cl using H2NOSiMe3 and has been converted into its O-benzoyl derivative Ph2P(S)NHOCOPh 6. The principal reaction of the derivative 6 with base (NaOMe or ButNH2) is rearrangement, transposition of sulfur and oxygen giving Ph2P(O)NHSCOPh 7; this then reacts further, forming the phosphinic amide Ph2P(O)NH2 together with PhCO2Me or PhCONHBut. The rearrangement probably involves intramolecular nucleophilic displacement of benzoate by the P=S group of 6, forming an intermediate with P, N and S atoms in a three-membered ring.
- Harger, Martin J. P.
-
p. 3205 - 3209
(2007/10/03)
-