Pyrimidines 2.4.6- trichloro-, synthesis

Imidazo[l,2-c]pyrimidine, 2,5,7-trichloro-nucleophilic displacement reactions, 5, 627 Imi dazo[ 1,2-a]pyrimidines pK, 3, 338 reactivity, 5, 627 synthesis, 5, 647 Imidazo[ 1,2-c]pyrimidines reactions, 5, 627 structure, 5, 610 synthesis, 5, 648-649 lmidazo[ 1,5-a]pyrimidines reactions, 5, 628 synthesis, 5, 649 lmidazo[l,5-6]pyrimidines synthesis, 5, 649-650 Imidazopyrrolopyridines bromination, 4, 506 lmidazo[4,5-6]quinoxaline nomenclature, 1, 22... 

Thiazolo[5,4-d]pyrimidine, 2,5,7-trichloro-nucleopfulic substitution, 6, 686 Thiazolo[3,2-a]pyrimidine-5,7-diones IR spectra, 6, 672 Thiazolopyrimidines synthesis, 5, 572, 574, 578 Thiazolopyrimidines, amino-purine synthesis from, 5, 591 Thi azolo[3,2-ajpyrimidines synthesis... 

An extremely simple one-pot synthesis of pyrazoles, pyrimidines, and isoxazoles has been realized by reacting enamino ketones, formed in situ with the appropriate bidentate nucleophile, under the action of microwaves [38]. Another approach to pyrazole from 4-alkoxy-l,l,l-trichloro-3-alken-2-ones and hydrazines, with toluene as solvent, is also possible under microwave conditions [39]. The Ullman coupling of (S)-[l-(3-bromophenyl)ethyl]ethylamine with N-H-containing heteroarenes such as pyrazole in N-methylpyrrolidone afforded the N-arylated compounds in high yields under microwave heating conditions at 198 °C [40]. 

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