Reaction of tetraalkoxycalix[4]arenes 1 and 2 with silver trifluoroacetate followed by in situ addition of iodine leads to the corresponding iodocalix[4]arenes 3 and 4 in 90% yield. The insertion of terminal alkynes was obtained in good yield using copper(I) iodide-tetrakis(triphenylphosphine)palladium(0) as catalyst. The synthesis of a double calix[4]arene, 11, bearing two bis-ethynyl bridges is reported.
Iodo-and Alkynylcalix[4]arenes: Versatile Precursors for Host Synthesis / Arduini, Arturo; Pochini, Andrea; A. R., Sicuri; Secchi, Andrea; Ungaro, Rocco. - In: GAZZETTA CHIMICA ITALIANA. - ISSN 0016-5603. - 124:(1994), pp. 129-132.
Iodo-and Alkynylcalix[4]arenes: Versatile Precursors for Host Synthesis
ARDUINI, ArturoWriting – Review & Editing
;POCHINI, AndreaConceptualization
;SECCHI, AndreaInvestigation
;UNGARO, RoccoSupervision
1994-01-01
Abstract
Reaction of tetraalkoxycalix[4]arenes 1 and 2 with silver trifluoroacetate followed by in situ addition of iodine leads to the corresponding iodocalix[4]arenes 3 and 4 in 90% yield. The insertion of terminal alkynes was obtained in good yield using copper(I) iodide-tetrakis(triphenylphosphine)palladium(0) as catalyst. The synthesis of a double calix[4]arene, 11, bearing two bis-ethynyl bridges is reported.File in questo prodotto:
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