Peroxycarbamic acid

Peroxyesters include the alkyl esters of peroxycarboxyhc acids monoperoxydicarboxyhc acids diperoxycarboxyhc acids monoperoxy- (30) and diperoxycarbonic (31) acids monoperoxy- (32) and diperoxyoxahc (33) acids peroxycarbamic acids (34) peroxysulfonic acids (35) and peroxyphosphoric acids (36). 

Peroxyeslerx include the alkyl esters of peroxycarboxylic acids tnonoper-oxydicarboxylic acids diperoxycarboxylic acids monoperoxy- (24) and diperoxycarhonic (25) acids monoperoxy- (26) and diperoxyoxalic (27) acids peroxycarbamic acids (28) peroxysulfonic acids (29) and perox-yphosphoric acids. 

Peroxycarbamic acid derivatives are very reactive epoxidizing agents that can be employed under mild conditions and are practically independent of the solvent effect examples are the reagent (probably 40) prepared from carbonylditriazole with H2O2 and A-benzoylperoxycarbamic acid The latter is very useful for... 

The yields of epoxides are 35-70% the yields of 1,3-diphenylurea are 92-98%. Yields of epoxides are improved by use of nonpolar solvents such as n-pentane or benzene. p-Chlorophenyl isocyanate gives somewhat higher yields than phenyl isocyanate. The active intermediate is probably an isocyanate-hydrogen peroxide complex rather than a peroxycarbamic acid (CgHsNHCOgH).1 N. Matsumura, N. Sonoda, and S. Tsutsumi, Tetrahedron Letters, 2029 (1970)... 

Acyl nitrites Enisocy anates N-Hydroxyurethans Peroxycarbamic acids... 

C-Nitrosoformic acid esters Peroxycarbamic acids and esters... 

The first-order decomposition rates of alkyl peroxycarbamates are strongly influenced by stmcture, eg, electron-donating substituents on nitrogen increase the rate of decomposition, and some substituents increase sensitivity to induced decomposition (20). Alkyl peroxycarbamates have been used to initiate vinyl monomer polymerizations and to cure mbbers (244). They Hberate iodine quantitatively from hydriodic acid solutions. Decomposition products include carbon dioxide, hydrazo and azo compounds, amines, imines, and O-alkyUiydroxylarnines. Many peroxycarbamates are stable at ca 20°C but decompose rapidly and sometimes violently above 80°C (20,44). 

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