Azide hydrogenation

Manganese dioxide Aluminum, hydrogen sulfide, oxidants, potassium azide, hydrogen peroxide, peroxosulfuric acid, sodium peroxide... 

This indicates that the thermally or photochemically decomposed azide (Figure 4) inhibits the dissolution of the styrene resin into the alkaline developer. The inhibition may be due to the increase of the molecular weight of the styrene resin in the presence of the decomposed azide. Hydrogen abstraction from the polymer by nitrene of the decomposed azide and subsequent polymer radical recombination result in a increase in the molecular weight of the polymer (17). 

Sodium azide/hydrogen peroxide solution10 1 % (w/v) sodium azide in 0.3% (v/v) hydrogen peroxide This solution must be prepared m a fume cupboard and handled with care. 

Incubate slides in sodium azide/hydrogen peroxide solution for 20 mm at room temperature (see Note 6). 

Sodium azide/hydrogen peroxide solution blocks endogenous peroxidase enzyme activity This is important m cervical smears where large numbers of neutrophil polymorphs and red blood cells are present. Although often not essential when analyzing cultured cells or biopsies, incubation m this solution is equally effective with these sample types. 

I. Reaction with Sodium Azide, Hydrogen Peroxide and Iron(III) Chloride... 

The decrease in solubility upon exposure in this type of resist was first ascribed to the formation of a secondary amine generated from nitrene insertion into C-H bonds of the polymer (see Scheme 3.6) (88). However, gel permeation chromatographic analyses revealed that the molecular weight of poly(p-vinylphenol) increased upon irradiation in the presence of the azide. Hydrogen abstraction from the polymer by nitrene and subsequent polymer... 

Another attractive route to aminocarboxylalkylphosphonic acids involves the intermediacy of the ethyl oc-azidoacetate (Scheme 5.91). Addition of MeONa in MeOH to a solution of dialkyl 4-formylbenzylphosphonate and ethyl a-azidoacetate in MeOH at -30°C provides the vinyl azide. Hydrogenation of the vinyl azide with 10% Pd/C in MeOH gives the aminoester, which at... 

Carbohydrates can be used as chiral templates, as seen many times in previous sections. As part of a bleomycin A2 synthesis,134,135 Hecht converted 5-deoxy-L-arabano-7-lactone (6.254) to 6.255.l35e Reaction with azide, hydrogenation of the azide and an unusual N-benzylation reaction gave the acetonide of N-benzyl 4-(N-... 

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