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Nitrering av aromatiske og heteroaromatiske forbindelser, saerlig med dinitrogenpentoksid som nitreringsreagens. (Nitration of aromatic and heteroaromatic compounds, particularly with dinitrogen pentoxide as a nitration agent).

DE96723180

Publication Date	1994
Personal Author	Hegbom, I.
Page Count	208
Abstract	The main purpose of this thesis is to study the usefulness of dinitrogen pentoxide as a nitration agent for aromatic and hetero aromatic compounds, and to compare the results with those obtained by means of other nitration methods. A study of the mechanism for the nitration of pyridine and substituted pyridines with dinitrogen pentoxide in liquid sulphur dioxide is presented. Nitration of benzene and substituted benzenes by dinitrogen pentoxide in liquid sulphur dioxide or liquid carbon dioxide gave the corresponding nitroarenes with substitution patterns similar to those obtained by nitration with HNO(sub 3)/H(sub 2)SO(sub 4). Results from nitration of toluene, dimethyl and diethyl isophthlate under different sets of conditions indicated that N(sub 2)O(sub 5) in liquid SO(sub 2) or fuming nitric acid was a more reactive nitration medium than both HNO(sub 3)/H(sub 2)SO(sub 4) and NO(sub 2)BF(sub 4)/SO(sub 2). Nitration of pyridine, mono- and dimethyl pyridines with N(sub 2)O(sub 5) in liquid sulphur dioxide gave the corresponding (beta)-nitro pyridines in moderate to good yields, except from 2,5-, 2,6- and 3,5-dimethyl pyridine which only gave traces of nitrated products. The yields of nitro pyridines in nitration of several mono substituted pyridines depended on the substituent and its position in the pyridine ring. 201 refs., 71 figs., 22 tabs.
Keywords	Nitration Aromatics Benzene Chemical Reaction Kinetics Chemical Reactions Fourier Transform Spectrometers Gas Chromatography Imidazoles Infrared Spectra Mass Spectroscopy NMR Spectra Pyridines Pyrimidines Solvents Thiophene Toluene Theses Foreign technology EDB/400201
Source Agency	TIC Foreign Exchange Reports
NTIS Subject Category	99F - Physical & Theoretical Chemistry
Corporate Authors	Norges Tekniske Hoegskole, Trondheim.
Supplemental Notes	Norwegian.
Document Type	Thesis
Title Note	Thesis (Dr.ing.).
NTIS Issue Number	199614

Nitrering av aromatiske og heteroaromatiske forbindelser, saerlig med dinitrogenpentoksid som nitreringsreagens. (Nitration of aromatic and heteroaromatic compounds, particularly with dinitrogen pentoxide as a nitration agent).

Nitrering av aromatiske og heteroaromatiske forbindelser, saerlig med dinitrogenpentoksid som nitreringsreagens. (Nitration of aromatic and heteroaromatic compounds, particularly with dinitrogen pentoxide as a nitration agent).
DE96723180

Publication Date	1994
Personal Author	Hegbom, I.
Page Count	208
Abstract	The main purpose of this thesis is to study the usefulness of dinitrogen pentoxide as a nitration agent for aromatic and hetero aromatic compounds, and to compare the results with those obtained by means of other nitration methods. A study of the mechanism for the nitration of pyridine and substituted pyridines with dinitrogen pentoxide in liquid sulphur dioxide is presented. Nitration of benzene and substituted benzenes by dinitrogen pentoxide in liquid sulphur dioxide or liquid carbon dioxide gave the corresponding nitroarenes with substitution patterns similar to those obtained by nitration with HNO(sub 3)/H(sub 2)SO(sub 4). Results from nitration of toluene, dimethyl and diethyl isophthlate under different sets of conditions indicated that N(sub 2)O(sub 5) in liquid SO(sub 2) or fuming nitric acid was a more reactive nitration medium than both HNO(sub 3)/H(sub 2)SO(sub 4) and NO(sub 2)BF(sub 4)/SO(sub 2). Nitration of pyridine, mono- and dimethyl pyridines with N(sub 2)O(sub 5) in liquid sulphur dioxide gave the corresponding (beta)-nitro pyridines in moderate to good yields, except from 2,5-, 2,6- and 3,5-dimethyl pyridine which only gave traces of nitrated products. The yields of nitro pyridines in nitration of several mono substituted pyridines depended on the substituent and its position in the pyridine ring. 201 refs., 71 figs., 22 tabs.
Keywords	Nitration Aromatics Benzene Chemical Reaction Kinetics Chemical Reactions Fourier Transform Spectrometers Gas Chromatography Imidazoles Infrared Spectra Mass Spectroscopy NMR Spectra Pyridines Pyrimidines Solvents Thiophene Toluene Theses Foreign technology EDB/400201
Source Agency	TIC Foreign Exchange Reports
NTIS Subject Category	99F - Physical & Theoretical Chemistry
Corporate Authors	Norges Tekniske Hoegskole, Trondheim.
Supplemental Notes	Norwegian.
Document Type	Thesis
Title Note	Thesis (Dr.ing.).
NTIS Issue Number	199614