Tetrahedron p. 9912 - 9924 (2010)
Update date:2022-08-05
Topics: Synthesis Regioselectivity Yield NMR spectroscopy reflux Chromatography Recrystallization Mass spectrometry (MS) Nucleophilic substitution Reagent Cyclization Purification Condensation Reaction Catalysis Substrate Reaction Optimization Heterocyclic compound Melting Point Determination
Grosjean, Sylvain
Triki, Smail
Meslin, Jean-Claude
Julienne, Karine
Deniaud, David
The multi-step synthesis of 1,3,7-trisubstituted pyrimido[1,2-a] pyrimidinediones starting from isothiocyanates is described. These nitrogen bicycles were prepared by an iterative sequence of functionalization/ cyclocondensation reactions. [4+2] Cycloaddition reactions took place between diazadienic chains and various acyl chlorides providing sophisticated heterobicycles.
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