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2005
Imidazole derivatives
R 0190
Synthesis of Purines and Other Fused Imidazoles from Acyclic Amidines and
— A general method for the preparation of purines, xanthines or other
37- 123 Guanidines.
fused imidazole systems is developed. It allows for assembly of the ring system at the
ring fusion, and the cores can be prepared in one step from an amidine or a guanidine
and an A-ring precursor in the presence of CuI. The reaction works best on electron-deficient ring systems, but can also be performed on more electron-rich systems at
elevated temperatures. — (SZCZEPANKIEWICZ*, B. G.; ROHDE, J. J.;
KURUKULASURIYA, R.; Org. Lett. 7 (2005) 9, 1833-1835; Metab. Dis. Res.,
Global Pharm. Res. Dev., Abbott Park, IL 60064, USA; Eng.) — Y. Steudel
2005
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