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With respect to the relatively low molecular mass, these chromophores display a rather favorable molecular figures of merit, b0m/Mw, where Mw is the molar mass. , glass transitions, a favorable property for composites in photo refractive materials. Based upon the peculiar reactivity of nitrothienyl substituted alkynes a one-pot three-component coupling-aminovinylation sequence to push-pull chromophores was readily developed [43]. Terminal alkynes 4 and sufficiently electron-deficient heteroaryl halides 5 were transformed under Sonogashira conditions into the expected coupling products, which were subsequently reacted in a one-pot fashion with secondary amines 2 to furnish the push-pull systems 6 in good yields (Scheme 4).

1 Domino Synthesis of 2-Substituted Quinolines . . . . . . . . . . . . . . . . . . . 2 Domino Synthesis of Spiro-Benzofuranones and Spiro-Benzoindolones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 9 Conclusion and Outlook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 References . . . .

4 Pyrimidines by a Two-Step Sequence of Consecutive 3CR of (Hetero)Arenes, Oxalyl Chloride, Alkynes, and Cyclocondensation with Guanidinium Salts . . . . 5 Benzo[b][1,4]Diazepines by a Consecutive 3CR of Acid Chlorides, Alkynes, and Ortho-Phenylene Diamines . . . . . . . . . . . . . . . . . . . . . . 6 Benzo[b][1,5]Thiazepines by a Consecutive 3CR of Acid Chlorides, Alkynes, and Ortho-Amino Thiophenols . . . . . . . . . . . . . . . . . . .

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