Extended jr-conjugated systems

Ajayaghosh A, George SJ, Schenning APHJ (2005) Hydrogen-Bonded Assemblies of Dyes and Extended jr-Conjugated Systems. 258 83-118 Akai S, Kita Y (2007) Recent Advances in Pummerer Reactions. 274-. 35-76 Albert M, Fensterbank L, l.acote E, Malacria M (2006) Tandem Radical Reactions. 264 1-62 Alberto R (2005) New Organometallic Technetium Complexes for Radiopharmaceutical Imaging. 252 1-44... 

Ajayaghosh A, George SJ, Schenning APHJ (2005) Hydrogen-Bonded Assemblies of Dyes and Extended jr-Conjugated Systems. 258 83-118 Alberto R (2005) New Organometallic Technetium Complexes for Radiopharmaceutical Imaging. 252 1-44... 

Hydrogen-Bonded Assemblies of Dyes and Extended jr-Conjugated Systems... 

Much of the original interest in preparing vinylogous porphyrins stemmed from a desire to obtain annulene-like systems with large, extended jr-conjugation pathways that could be used both to explore the limits of aromaticity and test for the possible existence of antiaromaticity. As will be discussed later on in this chapter,... 

Dehydrodiscretamine (72), Thalifedine (73), Thalidastine (74), Fissisaine (75), Stepharanine (76), and Dehydrocorydalmine (77) are additional examples of alkaloids, which possess the 7-hydroxy-isoquinoline moiety which on deprotonation yields conjugated mesomeric betaines (Scheme 27). In either case, the jr-electron system is extended by substitution... 

Extended conjugated systems of jr-electrons make these compounds promising candidates for various elecfronic devices [49, 50] and solar cell compo-nenfs [51,52]. These macrocycles provide a variefy of subsfifufion sifes which can be used fo create compounds with controlled electron donor/acceptor properties [53, 54]. In nature, metal-containing macrocycles are present as central structural units in many substances involved in biochemical redox reactions [55]. 

---