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2004
Fused pyrimidine derivatives
R 0515
First Functionalization by Metalation of the Pyridine Moiety of 4-MethoxypyriDiazines. Part 38. — Starting from pyridopyrimidin-4(3H)-ones
45- 177 dopyrimidines.
such as (I), the corresponding 4-methoxypyridopyrimidines are prepared and subjected
to lithiation and reaction with various electrophiles. The mostly high regioselectivities
are discussed in terms of the α-, peri- and ortho-directing effects of the ring nitrogen
atoms and the methoxy and chloro substituents. — (AUDOUX, J.; PLE*, N.; TURCK,
A.; QUEGUINER, G.; Tetrahedron 60 (2004) 30, 6353-6362; Lab. Chim. Org. Fine
Heterocycl., IRCOF, Inst. Natl. Sci. Appl. Rouen, F-76131 Mont-Saint-Aignan, Fr.;
Eng.) — Kieslich
2004
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