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Beilstein J. Org. Chem. 2018, 14, 243–252, doi:10.3762/bjoc.14.16
Graphical Abstract
Figure 1: The selected examples of sulfur(IV) and sulfur(VI) ylides 1 [1], 2 [5-7], 3 [6,7,9], 4 [11,12], 5 [33,34], 6 [35-38].
Figure 2: Metal-free synthesis of thiophene-based heterocycles (A) [54,55], (B) [56].
Scheme 1: One-pot sequential synthesis of the trisubstituted 5-(pyridine-2-yl)thiophenes 8a. Substrate: amalo...
Figure 3: X-ray crystal structures of 8ad and 8an [68].
Figure 4: The proposed structure of sulfur ylide-like intermediates; resonance contributors (mesomeric struct...
Scheme 2: The substitution reaction with MeOH.
Beilstein J. Org. Chem. 2016, 12, 1780–1787, doi:10.3762/bjoc.12.168
Figure 1: Bioactive pyrrolo[2,1-f][1,2,4]triazin-4(3H)-ones [1-12].
Figure 2: General synthetic routes to pyrrolotriazinones [3-6,8,9,11].
Scheme 1: Synthesis of pyrrolotriazinones 9 and 12 [9,10,18].
Scheme 2: Synthesis of aminopyrrolocarbamate 10.
Figure 3: Probable mechanism for the synthesis of triazinone 12a.
Figure 4: The results of 13C NMR and IR studies.