The first synthesis of 3-methoxalylchromone was described. The reaction of the latter with electron-rich aminoheterocycles afforded a set of heteroannelated pyridines bearing a CO(2)Me substituent located at the α-position of the pyridine core.

A variety of novel alkynyl-substituted pyrimidines were prepared by the first site-selective Sonogashira cross-coupling reactions of 2,4,5,6-tetrachloropyrimidine. The products, di-, tri-, and tetraalkynyl-pyrimidines, exhibit fluorescence in the

Synthesis and Photophysical Properties of Alkynylated Pyrimidines by Site-Selective Sonogashira Reactions of 2,4,5,6-Tetrachloropyrimidine; First Synthesis of Tetraalkynyl-pyrimidines. -The di-, tri-and tetraalkynyl-pyrimidines exhibit fluorescence in the range of 395-470 nm. -(MALIK, I.; AHMED, Z.; REIMANN, S.; ALI, I.; VILLINGER, A.; LANGER*, P.; Eur.

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