Poly Kovacic synthesis

J Kovacs, R Gianotti, A Kapoor. Polypeptides with known repeating sequence of amino acids. Synthesis of poly-L-glutamyl-L-alanyl-L-glutamic acid and polyglycyl-L-phenylalanine through pentachlorophenyl active ester. J Am Chem Soc 88, 2282, 1966. 

The formation of symmetrical C-C bonds by the oxidative homocoupling of benzene and its electron-rich derivatives to yield poly(p-phenylene)s was achieved in the pioneering studies of Scholl [13, 14] during the early 1920s, followed by Kovacic (1960) [15-17], by applying various Lewis acid/oxidant combinations. The formation of each new C-C bond leads to the elimination of two protons, which are expelled as two HCl molecules (Scheme 13.1). The intramolecular adaptations of these oxidative methods have been applied towards the synthesis... 

Of all the chemical processes which were reviewed and described in references [1-3], it should be noted that up to now only the Kovacic and Yamamoto reactions and, to a lesser extent, the thermal dehydrogenation of poly(l,3-cyclohexadiene) have been used to synthesize polyphenylenes for usual or special applications. Only recently, a new impulse has been given to the synthesis of linear functionalized high molecular-weight PPPs with the adaptation of the Suzuki reaction, and this is currently one of the best possible ways of synthesizing soluble, functionalized PPPs for specific applications with, in particular, the realization of rigid rod-like polymers for mechanical applications, as will be shown in Section 2.1.3. 

Suda K, KanlayaM, Manit S (2002) Synthesis and property characterization of cassava starch grafted poly[acrylamide-co-(maleic acid)] superabsorbent via-y irradiation. Polymer 43 3915-3924 Tabi T, Kovacs JG (2007) Examination of injection molded thermoplastic maize starch. Express Polym Lett 1 804-809... 

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