Preparation of some new polybenzimidazoquinazolines

Saga, Motoo; Hachihama, Motokazu; Shono, Toshiyuki

doi:10.1002/pol.1970.150080832

Cited by 6 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2a-d. Bis(2-phenpl-1,2,4-triazolo[4,3-c In HzSOs ( (S-pheti~/-l,2,4-triazo/o[4,3-c]qui11azo/~-3-~~/)-bm~~~~us or -pyridine 19a-c were synthesized by the described method^'^^'"': their general properties together with the yields and elemental analyses are given in Tab. was prepared by the reaction of equal amounts of 2-(o-aminophenyl)benzimidazole (20) and benzoyl chloride in freshly distilled dry N,N-dimethylacetamide. The product was precipitated by pouring the reaction mixture into water, filtered and recrystallized from ethanol.…”

Section: Nn'-bis[(5-phenyl-l24-triazole-3-yl)phen~l]arplene Diamidmentioning

confidence: 99%

A general method of the synthesis of “step‐ladder” polymers

et al. 1975

View full text Add to dashboard Cite

A new general method for the synthesis of "step-ladder" polymers m'as developed. It involves the interaction of aromatic diamines, containing in o-positions aromatic heterocycles with reactive hydrogen atoms, with aromatic dicarboxylic acids or their derivatives. This general method was used for the preparation of new classes of thermally stable polymers of type 27, 28, 29 and 30, containing 1.2,4-triazole-, 1.2.4-triazolo[4,3-c]qtiinazoline-, benzimidazoleor benzimidazolo[ I ,2-(.]quinazoline-rings. Physical properties of these polymers were determined together with those of corresponding model compounds. ZUSAMMENFASSUNG:Eine n e w generelle Methode zur Synthese von .,Step-ladder"-Polymeren wurde entwikkelt. Dabei werden aromatische Diaminc. die in (Atellungen durch aromatische Heterocyclen mit reaktivem Wasserstoff substituiert sind, mit aromatischen Dicarbonsauren oder deren Derivate umgesetzt. Diesc generelle Methode nurde zur Darstellung neuer Klassen thermisch stabiler Polymerer des Typs 27,28,29 tind 30 verwendet, die 1.2,4-Triazol-. I ,2,4-Triazolo[4,3-c~]chinazolin, Henzimidazol-oder Benzimidazolo[ 1,2-c]chinazolin-Ringe enthalten. Die physikalischen tigenschaften dieser Polymeren sowie entsprechender Modellverbindungen wtirden bestimmt.

show abstract

Section: Nn'-bis[(5-phenyl-l24-triazole-3-yl)phen~l]arplene Diamidmentioning

confidence: 99%

A general method of the synthesis of “step‐ladder” polymers

et al. 1975

View full text Add to dashboard Cite

show abstract

High temperature resistant heterocyclic‐aromatic polymers. Synthesis, properties and applications

Critchley¹

1982

Angew. Makromol. Chem.

View full text Add to dashboard Cite

Die Angewandte Makromolekulare Chemie 109/110 (1982) 41-80 (Nr. 1750) S t r u c t u r e s Ikpartment, l b y a l A i r c r a f t Eetablishment, Farnborough, Hampshire, UK HIGH mATuRE REGISTANT HGI'EROCPCLIGA~TIC pOLYl4ERS. PROPERTIEG AND APPLICATIONS J. P. c r i t c h l e y SYKPBESIS , S -yAn outstanding achievement of organopolymer chemistry during the p a s t two decades has been the successful development of hightemperature-resistant heteroaromatic polymers.

show abstract

Novel thermostable polymers from bis‐o‐aminophenylbenzimidazoles and aromatic tetracarboxylic dianhydrides

Niume

Toda

Uno

et al. 1981

J. Polym. Sci. Polym. Chem. Ed.

View full text Add to dashboard Cite

Novel aromatic hetero polymers, polybenzoylenebenzimidazoquinazolines, were prepared. These polymers were synthesized by the polymerization of bis‐o‐aminophenylbenzimidazoles with aromatic tetracarboxylic dianhydrides in organic solvents, followed by cyclocondensation of the polyamic acids in polyphosphoric acid. In the resulting polymers the o‐phenylenediamine component behaved trifuntionally and the connecting groups were tricyclic fused rings that contained seven‐membered rings. These polymers some of which has a ladder‐type structure, exhibited excellent thermal properties.

show abstract

Preparation of some new polybenzimidazoquinazolines

Cited by 6 publications

References 3 publications

A general method of the synthesis of “step‐ladder” polymers

A general method of the synthesis of “step‐ladder” polymers

High temperature resistant heterocyclic‐aromatic polymers. Synthesis, properties and applications

Novel thermostable polymers from bis‐o‐aminophenylbenzimidazoles and aromatic tetracarboxylic dianhydrides

Contact Info

Product

Resources

About