期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2016, 期 34, 页码 5647-5652出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201600979
关键词
Borylation; C-H activation; Helicenes; Homogeneous catalysis; Iridium
资金
- Czech Science Foundation [14-16391P]
The Ir-catalyzed borylation of [4] helicene under different reaction conditions was studied for the first time. The results indicate that monoborylation proceeds to give a mixture of 2- and 3-borylated products in good yields (up to 74 % isolated yield). It was possible to shift the selectivity in favor of the 3-borylated product by using sterically demanding ligands. The monoborylated [4] helicenes were further arylated by using a Suzuki-Miyaura cross-coupling or oxidized to the corresponding phenols in very good yields.
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