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One-step synthesis of 3-cyano-6-methyl-4-thienyl-5,6,7,8-tetrahydro[1,6]naphthyridine-2(1H)-thiones and annelated heterocyclic systems on their basis
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Russian Chemical Bulletin
[DOI: 10.1007/s11172-005-0133-7]
Held, I.; Villinger, A.; Zipse, H., Synthesis 2005, 1425-1430.
The Stability of Acylpyridinium Cations and Their Relation to the Catalytic Activity of Pyridine Bases
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Synthesis
[DOI: 10.1055/s-2005-865317]