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Cas Database

1966-96-7

1966-96-7

Identification

  • Product Name:Hydrazine, (5-bromo-2-nitrophenyl)-

  • CAS Number: 1966-96-7

  • EINECS:

  • Molecular Weight:232.037

  • Molecular Formula: C6H6BrN3O2

  • HS Code:

  • Mol File:1966-96-7.mol

Synonyms:

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Relevant articles and documentsAll total 1 Articles be found

Competitive Cyclisations of Singlet and Triplet Nitrenes. Part 8. The 1-(2-Nitrenophenyl)pyrazoles and Related Systems

Lindley, John M.,McRobbie, Ian M.,Meth-Cohn, Otto,Suschitzky, Hans

, p. 982 - 994 (2007/10/02)

The title nitrenes, derived by nitro-group deoxygenation with triethyl phosphite or by thermolysis or photolysis of the corresponding azide, have been studied.The effect of substituents (Cl, Br, OMe, NMe2, Me, CF3, and NO2) both meta and para to the nitrene has been examined as a determinant of the preferred mode of cyclisation to either a pyrazolobenzotriazole or a pyrazoloquinoxaline.Similarly, the role of solvents, sensitisers, and quenchers has been studied.Routes to the isomeric 1- and 2-(2-nitrophenyl)-4,5,6,7-tetrahydroindazoles have been defined and the literature corrected by studing the nitrene-mediated cyclisation of these products.The chemistry of the analogous 1-(2-carbenophenyl)- and the 1-(2-nitrenosulphonylphenyl)-3,5-dimethylpyrazoles has also been examined, the former giving 2-(3,5-dimethylpyrazol-1-yl)-benzaldazine and -benzyl alcohol while the latter gave products of intramolecular nitrene attack (a pyrazolobenzothiatriazine) and intermolecular reaction.Rationalisations for all the reaction pathways have been advanced.

Process route upstream and downstream products

Process route

4-bromo-1,2-dinitrobenzene
610-38-8

4-bromo-1,2-dinitrobenzene

(5-bromo-2-nitro-phenyl)-hydrazine
1966-96-7

(5-bromo-2-nitro-phenyl)-hydrazine

Conditions
Conditions Yield
With ethanol; hydrazine hydrate;
With hydrazine hydrate; urea; In ethanol;
m-nitrobromobenzene
585-79-5

m-nitrobromobenzene

(5-bromo-2-nitro-phenyl)-hydrazine
1966-96-7

(5-bromo-2-nitro-phenyl)-hydrazine

Conditions
Conditions Yield
Multi-step reaction with 2 steps
1: 94 percent / fuming nitric acid, 98percent sulphuric acid / 1 h / 30 °C
2: urea, hydrazine hydrate / ethanol
With sulfuric acid; nitric acid; hydrazine hydrate; urea; In ethanol;
Multi-step reaction with 2 steps
1: concentrated H2SO4; HNO3
2: ethanol; hydrazine hydrate
With ethanol; sulfuric acid; nitric acid; hydrazine hydrate;
(5-bromo-2-nitro-phenyl)-hydrazine
1966-96-7

(5-bromo-2-nitro-phenyl)-hydrazine

Conditions
Conditions Yield
1-Brom-3.4-dinitro-benzol, Hydrazin-hydrat;
(O2N)2C6H3Br, N2H4*H2O;
4-bromo-1,2-dinitrobenzene
610-38-8

4-bromo-1,2-dinitrobenzene

(5-bromo-2-nitro-phenyl)-hydrazine
1966-96-7

(5-bromo-2-nitro-phenyl)-hydrazine

Conditions
Conditions Yield
With ethanol; hydrazine hydrate;
With hydrazine hydrate; urea; In ethanol;
m-nitrobromobenzene
585-79-5

m-nitrobromobenzene

(5-bromo-2-nitro-phenyl)-hydrazine
1966-96-7

(5-bromo-2-nitro-phenyl)-hydrazine

Conditions
Conditions Yield
Multi-step reaction with 2 steps
1: 94 percent / fuming nitric acid, 98percent sulphuric acid / 1 h / 30 °C
2: urea, hydrazine hydrate / ethanol
With sulfuric acid; nitric acid; hydrazine hydrate; urea; In ethanol;
Multi-step reaction with 2 steps
1: concentrated H2SO4; HNO3
2: ethanol; hydrazine hydrate
With ethanol; sulfuric acid; nitric acid; hydrazine hydrate;
(5-bromo-2-nitro-phenyl)-hydrazine
1966-96-7

(5-bromo-2-nitro-phenyl)-hydrazine

Conditions
Conditions Yield
1-Brom-3.4-dinitro-benzol, Hydrazin-hydrat;
(O2N)2C6H3Br, N2H4*H2O;

Global suppliers and manufacturers

Global( 2) Suppliers
  • Company Name
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  • SAGECHEM LIMITED
  • Business Type:Lab/Research institutions
  • Contact Tel:+86-571-86818502
  • Emails:will@sagechem.com
  • Main Products:28
  • Country:China (Mainland)
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