Journal
ORGANIC LETTERS
Volume 11, Issue 8, Pages 1681-1684Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol900116h
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Funding
- FWO
- Ministerie voor Wetenschapsbeleid
- KU Leuven
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The first rational, stepwise synthesis of enlarged oxacalix[n]arenes (n > 4) is described. Variously substituted oxacalix[3]arene[3]pyrimidines were prepared rather selectively by a straightforward [3 + 3] fragment coupling approach after a thorough search for the optimum nucleophilic aromatic substitution conditions. Similar procedures also allowed facile synthesis of unsymmetrical oxacalix[4]- and oxacalix[8]arenes.
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