期刊
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
卷 7, 期 -, 页码 1278-1287出版社
BEILSTEIN-INSTITUT
DOI: 10.3762/bjoc.7.148
关键词
biaryl; bromine-lithium exchange; ligand; lithiation; phosphine
资金
- LONZA AG, Switzerland
Regioselective bromine-lithium exchange reactions on polybrominated biaryls enable the modular synthesis of various polysubstituted biphenyls such as bis(dialkylphosphino)-, bis(diarylphosphino)- and dialkyl(diaryl) phosphinobiphenyls. All permutations of substituents at the ortho positions of the biphenyls are possible. In a similar manner, one can gain access to monophosphine analogues. So far, such a process, based on the effective discrimination between bromine atoms as a function of their chemical environment, has been observed only sporadically.
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