Phosphine, trimethyl oxides

Phosphine, seleno-metal complexes, 664 bidentate, 664 Phosphine, tributyl-, 992 Phosphine, trichloro-, 990 Phosphine, tricyclohexyl-, 992 Phosphine, triethyl-, 992 Phosphine, trifluoro-jt acidity, 1034 Phosphine, triisopropyl-, 992 Phosphine, trimethyl-, 990, 992 oxides... 

POCisHis, Phosphine, triphenyl-, oxide cerium complexes, 23 178 P03C3H, Trimethyl phosphite chromium complexes, 23 38 cobalt and rhodium complexes, 25 162-163... 

Tertiary phosphine oxides are stable. The temperatures required for thermal decomposition are approximately 300°C higher than the corresponding amine oxides (96). Trimethyl phosphine oxide is stable to 700°C. 

Codeposition of silver vapor with perfluoroalkyl iodides at -196 °C provides an alternative route to nonsolvated primary perfluoroalkylsilvers [272] Phosphine complexes of trifluaromethylsilver are formed from the reaction of trimethyl-phosphme, silver acetate, and bis(trifluoromethyl)cadmium glyme [755] The per-fluoroalkylsilver compounds react with halogens [270], carbon dioxide [274], allyl halides [270, 274], mineral acids and water [275], and nitrosyl chloride [276] to give the expected products Oxidation with dioxygen gives ketones [270] or acyl halides [270] Sulfur reacts via insertion of sulfur into the carbon-silver bond [270] (equation 188)... 

Diphenyl (2,4,6-trimethyl benzoyl) phosphine oxide 0.5 100 No damage... 

Catalytic forms of copper, mercury and silver acetylides, supported on alumina, carbon or silica and used for polymerisation of alkanes, are relatively stable [3], In contact with acetylene, silver and mercury salts will also give explosive acetylides, the mercury derivatives being complex [4], Many of the metal acetylides react violently with oxidants. Impact sensitivities of the dry copper derivatives of acetylene, buten-3-yne and l,3-hexadien-5-yne were determined as 2.4, 2.4 and 4.0 kg m, respectively. The copper derivative of a polyacetylene mixture generated by low-temperature polymerisation of acetylene detonated under 1.2 kg m impact. Sensitivities were much lower for the moist compounds [5], Explosive copper and silver derivatives give non-explosive complexes with trimethyl-, tributyl- or triphenyl-phosphine [6], Formation of silver acetylide on silver-containing solders needs higher acetylene and ammonia concentrations than for formation of copper acetylide. Acetylides are always formed on brass and copper or on silver-containing solders in an atmosphere of acetylene derived from calcium carbide (and which contains traces of phosphine). Silver acetylide is a more efficient explosion initiator than copper acetylide [7],... 

Aminopenici11 anic acid (I) is acylated, oxidized and esterified to give the sulfoxide ester (II). Sulfoxide ester (II) is converted to its C-6 epimer (III) by treatment with trimethyl chiorosilane and triethyl amine. Rearrangement of III using triphenyl phosphine yields the epioxazoline (IV). 

The McBride synthesis has been applied to the preparation of chiral phosphetane oxides by the reaction of optically active dichlorophosphines with 2,3,3-trimethyl-l-butene. Thus, myrtanyl-, bornyl-, and isopinocamphenyldichloro-phosphines afforded the corresponding phosphetane oxides having chirality localized on both the phosphorus substituent and the phosphorus center. In all cases, epimeric mixtures are obtained (Equation 22) <1997JOC297>. 

Another catalytically important type of pentacoordinate complex has recently been prepared by the oxidative addition of Z)A(benzoborazoles) to [RhCl(PPh3)3]. The boryl groups are labile - hence their complexes ability to catalyze borylation of organic substrates - and can be replaced by other boryl groups (Scheme 19). Trimethyl phosphine... 

N-acylaziridines occurs on treatment with triphenylphosphine with the formation of the ylides (67), thereby providing a route to a-substituted primary allylic amines via their in situ reactions with aldehydes.The reactions of triphenylphosphine with epoxides in phenolic media provide a new access to the vinyl-phosphonium salts (68). A route to 1-hydroxyalkylphosphonium salts is provided by the reactions of trimethyl- or triethyl-phosphine with aldehydes or ketones in the presence of anhydrous acids. The related 1-trimethylsiloxyalkylphosphonium salts can be isolated in the presence of trimethylsilyl chloride.Further Wittig-products have been isolated from the reaction of 1,2,3-indanetrione with triphenylphosphine, and, in related work, it has been shown that furoin is deoxygenated on heating with triphenylphosphine to form 2-furfuryl(2-furyl)ketone and triphenylphosphine oxide.The structure of the blue product from the reaction of triphenylphosphine with 2,3,5,6-tetracyano-7-oxabicyclo(2,2,1]hepta-2,5-diene has now been shown by X-ray techniques to be the stable ylide (69). ... 

Benzoyl Phosphine Oxides The photochemistry of these efficient photoinitiators has been studied in great details [2f,27-29]. Efficient radicals are produced in the triplet state on a very short timescale. The 2,4,6-trimethyl benzoyl-diphenylphosphine oxide TPO compound was the interesting starting molecule of the series (10.14). 

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