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2-Pyridin-2-yl-1H-imidazo[4,5-c]pyridine (39): Method A.
White solid, yield 78%, mp 232 °C, recrystallized from EtOH.
C11H8N4 (196.21). Anal. (C11H8N4) C calcd, 67.34; found, 67.82;
H, N.
8-Pyridin-2-yl-7(9)H-purine (40): Method B. White solid,
yield 62%, mp 289-291 °C, recrystallized from H2O. C10H7N5
(197.20). Anal. (C10H7N5) C calcd, 60.91; found, 61.63; H, N calcd,
35.51; found, 34.72.
2-Pyridin-2-yl-1H-imidazo[4,5-b]pyrazine (41): Method B.
Light brown solid, yield 69%, mp 306-309 °C, recrystallized from
aqueous ethanol, C10H7N5 (197,20). Anal. (C10H7N5) C calcd, 60.91;
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Acknowledgment. We thank Professor R. Hartmann for his
continued support of our work. This project was supported by
the Deutsche Forschungsgemeinschaft (Grant KL 1356) and the
Fonds der Chemischen Industrie.
Supporting Information Available: Analytical characterization
of compounds 3-32 and 36-41 and a table containing elemental
analyses of compounds 1-42. This material is available free of
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