Beilstein J. Org. Chem.2020,16, 317–324, doi:10.3762/bjoc.16.31
copolymer; nickel(II) catalyst; oligosiloxane; regioregular polythiophene; solubility; Introduction
Polythiophenes attract much attention in materials science because of their extended π-conjugation, which is applied for a wide range of electronic materials. In particular, the regioregular polymers with a
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Graphical Abstract
Scheme 1:
Cross-coupling polymerization of thiophene.
Beilstein J. Org. Chem.2016,12, 1203–1228, doi:10.3762/bjoc.12.116
and co-workers subsequently reported the hydroamination of methacrylonitrile 174 using palladium(II) catalyst 172 (Scheme 42a) [72]. Low temperature and bulky aryl groups on the catalyst were necessary to achieve good levels of enantioselectivity. In a later study, their nickel(II) catalyst 171 proved
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Graphical Abstract
Figure 1:
Two general pathways for conjugate addition followed by enantioselective protonation.