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Beilstein J. Org. Chem. 2016, 12, 2197–2203, doi:10.3762/bjoc.12.210
Graphical Abstract
Figure 1: Regioselectivity of the arylation of 3-substituted thiophenes.
Scheme 1: Blocking groups allowing regioselective C5-arylation of thiophenes.
Scheme 2: Reactivity of 2-bromothiophene with aryl bromides.
Scheme 3: Reactivity of 2-bromo-3-methylthiophene with (hetero)aryl bromides.
Scheme 4: Reactivity of 3-substituted 2-bromothiophenes with aryl bromides.
Scheme 5: 5-Heteroarylation of 2-aryl-5-bromothiophenes.
Scheme 6: 2-Heteroarylation of 2-bromo-3-methylthiophene.
Scheme 7: 5-Arylation of 2,3-disubstituted thiophenes.
Scheme 8: 5-Arylation of 2-aryl-5-bromothiophenes.
Scheme 9: Deprotection of 2-aryl-5-bromothiophene 14.