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Beilstein J. Org. Chem. 2007, 3, No. 23, doi:10.1186/1860-5397-3-23
Graphical Abstract
Figure 1: Thiophene structures 1, 2, and 3.
Figure 2: XR-693 and XR-906.
Scheme 1: Synthesis and Reactivity of 2,4,5-Tribromo-3-methylthiophene. Initial Bromination Approaches.
Scheme 2: Routes to 4-Bromo-3-methyl-2-thiopheneacid Chloride, 1, From 3-Methylthiophene, 4. (a) NBS/AcOH, 64...
Scheme 3: Vapor Phase Chlorination of 2-Thiophenecarbonitrile.
Scheme 4: Synthesis of 3,4,5-Trichloro-2-thiopheneacid Chloride, 2. (a) 1. n-BuLi/MTBE, -60°C, 2. CO2; or 1. ...
Scheme 5: Metal-Halogen Exchange in THF Solvent.