Diamine benzenes

The product from Stepl (10 mmol) was dissolved in 50 ml pyridine and 1,2-benzene diamine (10 mol) added. The mixture was heated to 55 °C, PCI3 (20 mmol) quickly added, and the mixture heated to 110-115 °C 48 hours. Thereafter, the contents were acidified with HCl to a final pH 2. The mixture was stirred with 300 ml CH2CI2 3 hours, extracted twice with 150 ml CH2CI2, and dried. The combined organics were washed with twice 100 ml 0.1 M HCl and then dilute Na2C03. Solvents were removed and the crude product re-crystallized in 95% ethyl alcohol. H- and C-NMR and IR data supplied for products. 

Soluble all-aromatic polyimides have been produced by coupling hexafluoropropane-(6F) and oxygen-(ODPA) containing dianhydrides with oxydianiline and bis(aminophenoxy)benzene diamines. 

SYNS m-ANtINOANILINE DIHYDROCHLORIDE 3-AMINOANILINE DIHYDROCHLORIDE m-BENZENE-DIAMINE DIHYDROCHLORIDE 1,3-BENZENE-DIAMINE HYDROCHLORIDE m-DIAMINOBENZENE DIHYDROCHLORIDE 1,3-DIAMINOBENZENE DIHYDROCHLORIDE 1,3-PHENYLENEDIAMINE DIHYDROCHLORIDE USAF EK-206... 

Propynal (HC CCHO) ( Caution. Propynal is a lachrymator, with a foul odor. An efficient fume hood must be used. o-Phenylenediamine (1,2-benzene-diamine j is toxic, and skin contact with the solid and inhalation either as vapor Or fine dust must be avoided) is prepared by standard methods but is used without first resorting to fractional distillation. o-Phenylenediamine is crystallized from water after purification with activated charcoal and sodium dithionite at 100° the diamine is sublimed before use. We strongly emphasize the care needed in diluting the propynal and that needed in adding a solution of the diamine. 

Synonyms/Trade Names 1,3-Diamino-4-methoxybenzene 4-Methoxy-1,3-benzene-diamine 4-Methoxy-m-phenyiene-diamine (Synonyms of saits vary depending upon the specific compound.)... 

Scheme 3. Synthesis of MA -(jialkanoyl-2,3,5,6-te-trakis(alkanoyloxy)-1,4-benzene diamines. Reagents (a) RCOCl/pyridine [13].

Another variation, employed by Matsu-naga and coworkers, has been to replace some of the ester linkages of the benzene hexa-alkanoates with amide groups. The most heavily substituted members of this class of compounds, the MN -dialkanoyl-2,3,5,6-tetrakis(alkanoyloxy)-1,4-benzene diamines (1) [15], are prepared by total acylation of3,6-diamino-l,2,4,5-tetrahydroxy-benzene [16] (Scheme 3). The mesophase behaviour of this series is summarized in Table 3. It is immediately apparent that the introduction of the two amide groups stabiliz-... 

Table 3. Transition temperatures of V,V -dialkanoyl-2,3,5,6-tetrakis(alkanoyloxy)-1,4-benzene diamines (1) (RCONH-/RCOO-).

Mugadza T, Nyokong T (2011) Electrochemical, microscopic and spectroscopic characterization of benzene diamine functionalized single walled carbon nanotube-cobalt (II) tetracarboxy-phthalocyanine conjugates. J Colloid Interf Sci 354 437-447... 

Poly(n,n -l,3-phenylene isophthalamide) Isophthaloyl chloridc- 1,3-phenyleneditimine polymei 25765-47-3 I, 3-Benzenedicarbonyl diohloride, polymer with 1, 3- benzene-diamine R (C H4Cl202- CftHsN,),... 

Poly( ,tt-1,4-phenylene terephthalamide) /2-Phenylenediamine-terephthaloyl chloride copolymer 26125-61-1 1, 4-Benzenedicarbonyl diohloride, polymer with 1, 4-benzene-diamine R (C8H4CI2O2 CfiH8N2).,... 

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