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Phosphorins trisubstituted

According to Markl, Lieb and Merz 2.4.6-trisubstituted X -phosphorins react with lithium or magnesium organocompounds, the carbanionic groups adding at... [Pg.66]

Trisubstituted X -phosphorins or X -phosphorins can be isolated unchanged even after long periods of irradiation when oxygen is excluded. Stade discovered that cyclic phosphinic acid esters 208 a-c which contain a cyclic butadiene (1.3)-moiety, photochemically rearrange smoothly to the tricyclic compounds 214 a-c. [Pg.126]

A niimber of 3,5-disubstituted and 3,4,5-trisubstituted X --phosphorins have been prepared from 1,2,3,6-tetrahydro-1- te2 t butylphosphorin-3-ones (Markl, Hock, and L. Merz, Ber., 1984, JM7, 763). [Pg.126]

The arylation of 2,4,6-trisubstituted A -phosphorins with benzenediazonium tetrafluoroborates in methanol gives the trisubstituted 1-aryl-1-methoxy-X -phosphorin and a second product with aryl substitution in the 4-aryl group of the original phosphorin. Related investigations have been carried out using other benzenediazonium salts (0. Schaffer and Dimroth, Ber., 1975, 1Q8. 3271, 3281). 2,4,6-Triphenyl-or 4--benzyl-2,6-diphenyl-X -phosphorin reacts with diazoalkanes in the presence of protic nucleophiles to form 1-substituted 1--alkyl-2,4,6-triphenyl- or 1-substituted 1-alkyl-4-benzyl--2,6-diphenyl-X -phosophorin (P. Kieselack, C. Helland, and Dimroth, Ber., 1975, 108, 3656). 1-Methoxy-1-phenylphosphorins readily couple with benzenediazonium tetrafluoroborates in methanol-benzene to give blue to blue-violet disazo dyes (23) (Markl and R. Liebl, Synth., 1978, 846). [Pg.127]

Oxidation of some 2,4,6-trisubstituted X -phosphorins by either chemical or electrochemical means gives short-lived cation-radical intermediates, which via the addition of water or methanol from the solvent afford radicals of the X -... [Pg.133]


See other pages where Phosphorins trisubstituted is mentioned: [Pg.45]    [Pg.78]    [Pg.506]    [Pg.463]    [Pg.506]   
See also in sourсe #XX -- [ Pg.126 , Pg.127 , Pg.133 ]




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