62264-49-7Relevant academic research and scientific papers
Scope and limitations of the Peterson olefination reaction as a route to vinylidene phosphanes
Izod, Keith,McFarlane, William,Tyson, Brent V.
, p. 1043 - 1048 (2007/10/03)
The Peterson olefination reaction has been investigated as a route to novel P-substituted alkenes. The reaction between [(nPr2P) 2(Me3Si)C]Li and paraformaldehyde cleanly gives the symmetrical vinylidene phosphane (nPr2P)2C=CH2 (4) in good to excellent yields. In contrast, reactions between [(R 2P)(Me3Si)2C]Li (R = Me, nPr) and paraformaldehyde yield complex mixtures of products which do not contain the expected vinylidene species. However, the unsymmetrical vinylidene phosphanes [nPr2P(BH3)](Me3Si)C=CH2 (6), (Ph2P)(iPr2P)C=CH2 (7), [nPr 2P(S)](Me3Si)C=CH2 (10), [Ph 2P(S)][iPr2P(S)]C=CH2 (11) and [Ph 2P(S)][Me2P(S)]C=CH2 (12) are readily accessible by the Peterson olefination reaction {compound 7 is obtained by deprotection of the corresponding borane adduct [Ph2P(BH 3)][iPr2P(BH3)]C=CH2 with pyrrolidine}. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
Unsymmetrical bis-phosphorus ligands. 9. Group 6 metal carbonyl complexes and other derivatives of various (phosphinomethyl)phosphine sulfides
Grim, Samuel O.,Mitchell
, p. 1762 - 1770 (2007/10/06)
Some chemistry of a new class of compounds, (phosphinomethyl)phosphine sulfides, Ph2P(S)CH2PR1R2, is described. Reaction with sulfur gives disulfides, Ph2P(S)CH2P(S)R1R2, with sodium gives unsymmetrical di(tertiary phosphines), Ph2PCH2PR1R2, with alkyl halides gives phosphonium salts, [Ph2P(S)CH2PR1R2R3]X, and with group 6 metal carbonyls gives a complex with phosphorus and sulfur bonded to the metal in a five-membered chelate ring, [Ph2P(S)CH2PR1R2]M(CO)4; heating causes the sulfur to transfer to the more basic phosphorus atom, producing Ph2PCH2P(S)R1R2. Extensive phosphorus and proton NMR data are given.
