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Highly diastereoselective synthesis of novel polymers via tandem Diels-Alder-ene reactions

โœ Scribed by Mallakpour, Shadpour E; Hajipour, Abdol-Reza; Mahdavian, Ali-Reza; Rafiemanzelat, Fatemeh


Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
212 KB
Volume
48
Category
Article
ISSN
0959-8103

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โœฆ Synopsis


Cis-9,10-dihydro-9,10-ethanoanthracene-11-12-dicarboxylic acid anhydride (1) was converted into its amic acid derivative by reaction with L-leucine. The cyclization reaction was carried out in situ using triethylamine to give the succinic imide-acid derivative (2). Compound (2) was converted to the acid chloride (3) by reaction with thionyl chloride. The reaction of acid chloride (3) with isoeugenol (4) was carried out in chloroform and a novel optically active isoeugenol ester derivative (5) was obtained in high yield. 4-Phenyl-1,2,4-triazoline-3,5-dione (PhTD) (6) was allowed to react with compound (5). The reaction is very fast and gives only one diastereoisomer of (7) via Diels-Alder and ene pathways in quantitative yield. Compound (7) was characterized by 1H NMR, IR, speciรผc rotation and elemental analysis, and was used as a model for the polymerization reactions. The polymerization reactions of compound (5) with bis-triazolinediones (8), (9) were performed in N,Ndimethylacetamide (DMAc) at room temperature. The reactions are exothermic and fast, and give novel optically active polymers. Some physical properties and structural characterizations of these new polymers have been studied, and are reported.


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ChemInform Abstract: Practical Synthesis
โœ Janice M. Holmes; Andrea L. Albert; Michel Gravel ๐Ÿ“‚ Article ๐Ÿ“… 2010 ๐Ÿ› John Wiley and Sons โš– 30 KB ๐Ÿ‘ 1 views

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