Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 74, Issue 20, Pages 7994-7997Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo901636k
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Funding
- National Science Council of the Republic of China [NSC 96-2113-M-030-003-MY2]
- National Center for Highperformance Computing
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1-Bromo-2-phenylcyclopropene (2) underwent [2+2] dimerization to generate 1,2-dibromo-4,5-diphenyltricyclo[3.1.0.0(2,4)]hexane (5), which was heated to form 1,2-dibromo-4,5-diphenyleyclohexa-1,4-diene (6) followed by oxidation to yield 4',5'-dibromo-o-terphenyl (7). o-Terphenyl 7 could be synthesized in one-pot reactions from 1, 1,2-tribromocyclopropane (3). When cyclopropane 3 was treated with 1.5 equiv of methyllithium followed by slowly adding the proton source, crossed [2+2] adduct 8 was isolated in 40% yield. Compound 8 was heated and oxidated to produce 4'-bromo-o-terphenyl (11).
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