Journal
ORGANIC LETTERS
Volume 10, Issue 11, Pages 2263-2265Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol800684x
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Treatment of an (o-alkynylphenyl)phosphine with a stoichiometric amount of BuLi effects a cyclization reaction to produce a 3-lithiobenzo[b]phosphole, which affords a variety of 3-substituted benzophospholes upon reaction with electrophiles. An example is given for the synthesis of a bis-benzo[b]phosphole, which can be further converted to the corresponding benzo[b]phosphole oxide possessing high electron affinity.
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