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2005
Pyridine derivatives
R 0380
3-Amino-3-thioxopropanamide in the Synthesis of Functionally Substituted Nico— The reaction of title amide (II) with olefins (I), (VI), or (XII) in the pres14- 150 tinamides.
ence of a base affords nicotinamides (III), dienes (VII), and pyridone (XIII), respectively. These products are alkylated at the sulfur by treatment with alkyl halides. Diene
(VIIb) undergoes additional ring closure reaction to provide nicotinamide (VIII),
whereas diene (VIIa) gives acyclic dienyl sulfide (XI). Product (VIII) is regioselectively brominated to provide derivative (IX). — (DYACHENKO, V. D.; TKACHEV, R. P.;
Russ. J. Org. Chem. 39 (2003) 8, 1174-1179; Lugansk Shevchenko State Pedagog.
Inst., Lugansk 348011, Ukraine; Eng.) — Klein
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