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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.