Synthesis of a nitrogen derivative of closo-2,4-dicarbaheptaborane

1980 ◽  
Vol 102 (1) ◽  
pp. 420-421 ◽  
Author(s):  
Gowit Siwapinyoyos ◽  
Thomas Onak
Keyword(s):  
Nitrogen Derivative

Characterization and thermal degradation kinetics of thermoplastic polyimide based on BAPP

2017 ◽  
Vol 30 (7) ◽  
pp. 787-793 ◽  
Author(s):  
Xu Su ◽  
Yong Xu ◽  
Linshuang Li ◽  
Chaoran Song
Keyword(s):  
Thermogravimetric Analysis ◽  
Thermal Degradation ◽  
Degradation Kinetics ◽  
Degradation Process ◽  
Thermal Degradation Kinetics ◽  
Heating Rates ◽  
Step Method ◽  
Nitrogen Derivative ◽  
Degradation Reaction ◽  
Kinetics Of

Two kinds of thermoplastic polyimides (PIs) were synthesized via a two-step method with 2,2-bis[4-(4-aminophenoxy)phenyl]propane (BAPP), 4,4′-oxydianiline (ODA) diamine, and 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA), and their thermal degradation kinetics was studied by thermogravimetric analysis at different heating rates under nitrogen. Derivative thermogravimetric analysis curves indicated a simple, single-stage degradation process in PI BTDA-BAPP and a two-stage degradation process in PI BTDA-ODA-BAPP. The activation energies ( Eas) of the thermal degradation reaction were determined by the Flynn–Wall–Ozawa and Kissinger–Akahira–Sunose methods without a knowledge of the kinetic reaction mechanism. By comparing the values of Ea and weight loss temperatures, it was demonstrated that the thermal stability of PI BTDA-ODA-BAPP was superior to that of PI BTDA-BAPP.

Theoretical calculation and structural studies for a new nitrogen derivative from nor-lapachol

2014 ◽  
Vol 1060 ◽  
pp. 233-238 ◽  
Author(s):  
Jademilson Celestino dos Santos ◽  
José Adonias A. de França ◽  
Lucas E. do Nascimento Aquino ◽  
Mariano Alves Pereira ◽  
Ana Carolina Mafud ◽  
...  
Keyword(s):  
Theoretical Calculation ◽  
Structural Studies ◽  
Nitrogen Derivative

scholarly journals 1,2-Azaborine: The Boron-Nitrogen Derivative ofortho-Benzyne

2015 ◽  
Vol 54 (27) ◽  
pp. 7819-7822 ◽  
Author(s):  
Klara Edel ◽  
Sarah A. Brough ◽  
Ashley N. Lamm ◽  
Shih-Yuan Liu ◽  
Holger F. Bettinger
Keyword(s):  
Nitrogen Derivative ◽  
Boron Nitrogen

scholarly journals Canine visceral leishmaniasis: successful chemotherapy induces macrophage antileishmanial activity via the L-arginine nitric oxide pathway.

1996 ◽  
Vol 40 (1) ◽  
pp. 253-256 ◽  
Author(s):  
I Vouldoukis ◽  
J C Drapier ◽  
A K Nüssler ◽  
Y Tselentis ◽  
O A Da Silva ◽  
...  
Keyword(s):  
Visceral Leishmaniasis ◽  
Competitive Inhibitor ◽  
Gamma Interferon ◽  
No Synthase ◽  
Antileishmanial Activity ◽  
Canine Visceral Leishmaniasis ◽  
Nitrogen Derivative ◽  
Leishmania Parasites ◽  
Nitric Oxide Pathway ◽  
Dependent Mechanism

Following successful chemotherapy in canine visceral leishmaniasis, monocyte-derived macrophages can induce antileishmanial activity via a gamma interferon-dependent mechanism in the presence of autologous lymphocytes. The killing of leishmania correlated with the induction of the NO synthase pathway, because it correlated with the generation of nitrogen derivative production and was abrogated in the presence of NG-monomethyl-L-arginine, a competitive inhibitor of the NO synthase pathway. The level of L-citrulline in serum, which was produced after activation of the NO synthase pathway, was markedly enhanced in dogs receiving successful chemotherapy. Taken together, these data indicate that following successful chemotherapy of visceral leishmaniasis, leishmania parasites are killed by macrophages activated by gamma interferon-producing lymphocytes via an NO-dependent mechanism.

scholarly journals Synthesis and characterization Some of heterocyclic compounds from Nitrogen derivative

2019 ◽  
Vol 10 (4) ◽  
pp. 3186-3196
Author(s):  
Sarah Mohammed Abed ◽  
Hasan Thamer Ghanem
Keyword(s):  
Schiff Base ◽  
Aromatic Amines ◽  
Heterocyclic Compounds ◽  
Condensation Reaction ◽  
Synthesis And Characterization ◽  
Second Step ◽  
Azo Compound ◽  
Nitrogen Derivative ◽  
Amino Phenol ◽  
Primary Aromatic Amines

This paper involves the synthesis of new oxazepine derivatives by multi-reaction steps. The first step synthesis azo derivative from 2-naphthol with 3-aminoacetophenone. The second step was the condensation reaction between ketone group of the azo compound and different primary aromatic amines (4-amino phenol, 3-nitro aniline and 4-methyl aniline) to yiled new azo Schiff base compounds (S1-S3) respectively. In the final step, Oxazepine compounds (L1-L3)and (L4-L6)were prepared from reaction imine compounds (S1-S3) with maleic and phthalic anhydride in toluene as solvent. All these derivatives were characterized by melting point, FTIR, HNMR and 13CNMR.

1,2-Azaborine: The Boron-Nitrogen Derivative ofortho-Benzyne

2015 ◽  
Vol 127 (27) ◽  
pp. 7930-7933 ◽  
Author(s):  
Klara Edel ◽  
Sarah A. Brough ◽  
Ashley N. Lamm ◽  
Shih-Yuan Liu ◽  
Holger F. Bettinger
Keyword(s):  
Nitrogen Derivative ◽  
Boron Nitrogen
Sign in / Sign up

Export Citation Format

Share Document