Sydnones, reduction

Sydnone, 3-p-nitrophenyl-4-phenyl-mass spectra, 6, 370 Sydnone, 3-phenyl-acetylation, 5, 58 6, 373 carbonylation, 6, 373 dipole moments, 6, 368 nitration, 6, 372 reduction, 6, 371 Vilsmeier reaction, 6, 373 Sydnone, 4-phenyl-3-p-tolyl-photolysis, 6, 374 Sydnone, 3-(3-pyridyl)-photolysis, 6, 375 Sydnone, 3-p-tolyl-dipole moments, 6, 368 Sydnones... 

The polarographic reductions of cephaloridine, cephalothin, and cephalosporin C each yield one wave that is both pH and concentration dependent [126]. The reduction of these compounds and a related derivative, 3-(5-methyl-1,3,4-thiadiazol-2-ylthiomethyl)-7-[2-(3-sydnone)acetamido]-3-cephem-4-carboxylic acid-sodium salt [I], have been described [127]. The reduction of I yields two waves. The first is believed to be the two-electron reductive elimination of the... 

Other examples include 4-bromosydnones,< ) diaryl iodonium salts and bromonaphthalenes.< > The first wave in the polaro-graphic curve of 4-bromosydnones corresponds to the reduction of the C-Br bond, while the second is practically identical to the wave of the parent sydnone. The first two waves of diaryl iodonium... 

---