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Synthesis and characterization of new optically active polyamides containing 2-(4-nitro-1,3-dioxoisoindolin-2-yl)succinic acid and aromatic diamines via direct polycondensation
Optically active polymers polyamides (PAs , thermal stability
2010/10/14
A new class of optically active polyamides (PAs) (6a-e) having 4-nitro-1,3-dioxoisoindolin-2-yl pendent groups were prepared by direct polycondensation reaction of 2-(4-nitro-1,3-dioxoisoindolin-2-yl)...
Synthesis and Characterization of Polyimides Prepared from Optically Active (R,R) and (S,S)-1,3-bis(p-N,N´-dimethylaminobenzyl)-perhydrobenzimidazol-2-thion
Polyimides thermally stable polymers dianhydride optically active polymers
2010/4/16
This paper presents the synthesis and characterization of polyimides containing a chiral (R,R) or (S,S) 1,3-bis(p-N,N´-dimethylaminobenzyl)-perhydrobenzimidazol-2-thion unit in the backbone. The...
Preparation of Optically Active Amino Acid Derivatives of Some Methylated 5-Amino-Azaheterocycles
Preparation Optically Active Amino Acid Derivatives Methylated 5-Amino-Azaheterocycles
2010/6/28
The present paper describes the reduction of 1-methyl-5-nitro-benzimidazoles ({\bf 1A, 2A}) and 1,3-dimethyl-2H-5-nitro-benzimidazol-2-one ({\bf 3}) to 5-aminobenzimidazoles ({\bf 4A, 5A}) and 1,3-dim...