Intermediate of API

3491-12-1

  • Product Name：1,4-Bis(4-aminophenoxy)benzene （TPE-Q ）
  • Molecular Formula：C18H16N2O2
  • Specifications：99%
  • Molecular Weight：292.337
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Product Details;

CasNo： 3491-12-1

Molecular Formula： C18H16N2O2

Factory Sells Top Purity 1,4-Bis(4-aminophenoxy)benzene （TPE-Q ） 3491-12-1 Powder

  • Molecular Formula:C18H16N2O2
  • Molecular Weight:292.337
  • Vapor Pressure:1.66E-09mmHg at 25°C 
  • Melting Point:173 °C 
  • Refractive Index:1.667 
  • Boiling Point:483.6 °C at 760mmHg 
  • PKA:5.20±0.10(Predicted) 
  • Flash Point:267.8 °C 
  • PSA：70.50000 
  • Density:1.243 g/cm3 
  • LogP:5.59800 

1,4-Bis(4-aminophenoxy)benzene(Cas 3491-12-1) Usage

Uses

1,4-bis(4-aminophenoxy)benzene be used for preparation polyimide and epoxy resin material. 1,4-Bis(4-aminophenoxy)benzene  （TPE-Q ）, C18H16N2O2, is a precusor for the synthesis of polyimides. The mol­ecule is located on a crystallographic inversion center and the terminal amino­phen­oxy rings are almost perpendicular to the central benzene ring with a dihedral angle of 85.40 (4)°. The mol­ecular conformation is stabilized by N-H…O and N-H…N inter­molecular hydrogen-bonding inter­actions.

InChI:InChI=1/C18H16N2O2/c19-13-1-5-15(6-2-13)21-17-9-11-18(12-10-17)22-16-7-3-14(20)4-8-16/h1-12H,19-20H2

3491-12-1 Relevant articles

Low-dielectric-constant aromatic homopolyimide and copolyimide derived from pyromellitic dianhydride, 4,4′-oxydianiline, 2,2-bis[4-(4-aminephenoxy)phenyl]propane, 1,4-bis(4-aminophenoxy)benzene, or 1,3-bis(4-aminophenoxy)benzene

Guorong Qiu, Wenshi Ma, Yuanqi Jiao, Li Wu

, Journal of Applied Polymer Science, Volume136, Issue18 May 10, 2019 47405

The copolyimides were prepared with PMDA as an anhydride monomer, ODA as an amine monomer with the addition of 2,2-bis[4-(4-aminephenoxy)phenyl]propane, 1,4-bis(4-aminophenoxy)benzene, or 1,3-bis(4-aminophenoxy)benzene as another amine monomer. 

Thermal transition behaviors, solubility, and mechanical properties of wholly aromatic para -, meta -poly(ether-amide)s: Effect on numbers of para -aryl ether linkages

Zhang, Wen-Qiang,Wang, Xiu-Li,Liu, Gui-Cheng,Chen, Li,Wang, Yu-Zhong

, p. 84284 - 84293 (2016/10/12)

In order to make clear how the numbers o...

Novel diisocyano-based dinuclear gold(I) complexes with aggregation-induced emission and mechanochromism characteristics

Chen, Zhao,Li, Zheng,Yang, Lan,Liang, Jinhua,Yin, Jun,Yu, Guang-Ao,Liu, Sheng Hua

, p. 170 - 177 (2015/06/16)

A series of constitutional isomers conta...

Synthesis and properties of soluble polyimides based on isomeric ditrifluoromethyl substituted 1,4-bis(4-aminophenoxy)benzene

Zhiming Qiu a b, Junhua Wang a b, Quanyuan Zhang a b, Suobo Zhang a, Mengxian Ding a, Lianxun Gao a

, Polymer, Volume 47, Issue 26, 8 December 2006, Pages 8444-8452

In this paper, we report the synthesis and characterization of isomeric polyimides derived from a new diamine monomer, 1,4-bis(4-amino-3-trifluoromethylphenoxy)benzene, and a known analog 1,4-bis(4-amino-2-trifluoromethylphenoxy)benzene.  The isomeric ditrifluoromethyl substituted aromatic diamine, 1,4-bis(4-amino-3-trifluoromethylphenoxy)benzene (2), and a known analog 1,4-bis(4-amino-2-trifluoromethylphenoxy)benzene (3) were synthesized. 

3491-12-1 Process route

1,4'-bis(4-nitrophenoxy)benzene
20638-32-8

1,4'-bis(4-nitrophenoxy)benzene

1,4-bis(4-aminophenoxy)benzene
3491-12-1

1,4-bis(4-aminophenoxy)benzene

Conditions
Conditions Yield
1,4'-bis(4-nitrophenoxy)benzene; With 5%-palladium/activated carbon; In ethanol; at 50 ℃; for 0.5h;
With hydrazine hydrate; In ethanol; for 5.5h; Reflux;
90%
With iron(III) chloride hexahydrate; pyrographite; In ethanol; for 6h; Reflux;
85%
With palladium 10% on activated carbon; hydrogen; In methanol; at 20 ℃; Inert atmosphere; Schlenk technique;
69%
With hydrogenchloride; tin;
 
With hydrogen; nickel;
 
With NH2-NH2/FeCl3.H2O/active-C; In ethanol; for 6h; Reflux;
 
hydroquinone
123-31-9,8027-02-9

hydroquinone

1,4-bis(4-aminophenoxy)benzene
3491-12-1

1,4-bis(4-aminophenoxy)benzene

Conditions
Conditions Yield
Multi-step reaction with 2 steps
1: potassium carbonate / N,N-dimethyl-formamide / 8 h / 145 - 150 °C / Inert atmosphere
2: iron(III) chloride hexahydrate; pyrographite / ethanol / 6 h / Reflux
With iron(III) chloride hexahydrate; potassium carbonate; pyrographite; In ethanol; N,N-dimethyl-formamide;
 
Multi-step reaction with 2 steps
1: Inert atmosphere; Schlenk technique
2: palladium 10% on activated carbon; hydrogen / methanol / 20 °C / Inert atmosphere; Schlenk technique
With palladium 10% on activated carbon; hydrogen; In methanol;
 
Multi-step reaction with 2 steps
1: potassium carbonate / N,N-dimethyl-formamide / 8 h / 140 °C
2: NH2-NH2/FeCl3.H2O/active-C / ethanol / 6 h / Reflux
With potassium carbonate; In ethanol; N,N-dimethyl-formamide;
 

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