Diphenyl triphenylphosphane

Zinn(lI)-chlorid 488 Diphenyl- 32. 465f.. 506, 534 aus Diphenylsulfoxid und Molybdan(V)-chlorid 524 Triphenylphosphan 572 Zinn(II)-ch]orid 489 Dipropyl- 465 f -Hydroxy- 434 ff. oi-Hydroxy- 434ff. 

Diphenyl-(l,2-diphenyl-ethyl)-phosphanoxid293 Eine Losung von 10 g (0,038 mol) Triphenylphosphan, 9,0 g (0,088 mol) Phenylacetylen und 3 ml Wasser in 75 ml Bis-[2-hydroxy-ethyl]-ether wird 8 Stdn. zum RiickfluB erhitzt. Das Solvens wird i.Vak. abdeslilliert und der Riickstand aus Benzol umkristallisiert Ausbeute 7,2 g (56%) Schmp. 233-234°. 

Primary and secondary alcohols may serve as the source of alkyl groups in the preparation of aryl phenyl tellurium compounds. Phenyl tellurium cyanide, conveniently obtained from diphenyl ditellurium (p. 368), reacted smoothly with alcohols in dichloromethane in the presence of tributylphosphane. The alkyl phenyl telluriums were obtained in yields ranging from 32 to 78%. Triphenylphosphane or triethyl phosphite did not catalyze these reactions2. 

Diphenyl ditellurium in acetonitrile reacted at 125° with carbon monoxide at 100 atm in the presence of octacarbonyldicobalt to give phenyl tellurohenzoate in 52% yield. Carbon monoxide at only one atmosphere and 0° effected the same conversion when benzoyl(tetracarbonyl)cobalt was used instead of octacarbonyldicobalt. Addition of triphenylphosphane to the reaction mixture prevented the formation of phenyl telluroben-zoate. Attempts to carry out this carbonylation catalytically with respect to the cobalt compound failed. Bis[4-methoxyphenyl] ditellurium and didodecyl ditellurium did not produce any tellurocarboxylic esters under these conditions2. 

Diphenyl tellurium bis[trifluoroacetate] reacted under the same conditions with tetrame-thylurea, sulfoxides, triphenylphosphane oxide and sulfide, triphenylarsane oxide, pyridine 1-oxides, tetramethylpiperidine, benzimidazole, morpholine, and 7V,Ar-diphenylthiourea to give 1 1 complexes as sharp-melting, colorless solids that are soluble in common organic solvents3. 

Dichlorobis(triphenylphosphane)palladium as catalyst leads to mixtures of the tetracyclic homo-cyclotrimer 11 and the tris-cr-homotropone 12 with both 3,3-dimethyl- and 3,3-diphenyl-cyclopropene in relatively low yields. ... 

Treatment of 2,3-diphenyl-lV-tosylcyclopropenimine with triphenylphosphane at 20 C in di-chloromethane/methanol yielded 2,3-diphenyl-3-tosylacrylonitrile. ... 

In this example, the catalyst was prepared in situ from (dba)2Pd, CHC13 (dba = diphenyl-benzylidene acetone) and triphenylphosphane. The single product results from axial attack of the TMM unit onto the ketone. 

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