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Cyclobutadiene Complexes, XII . Alkynyl‐Substituted Tricarbonyl(cyclobutadiene)iron Complexes: Stille Coupling of Iodocyclobutadiene Complexes with Stannylalkynes
Author(s) -
Bunz Uwe H. F.,
WiegelmannKreiter Jutta E. C.
Publication year - 1996
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19961290709
Subject(s) - cyclobutadiene , chemistry , stille reaction , metalation , antiaromaticity , dimer , stereochemistry , organic chemistry , molecule , catalysis , aromaticity
The synthesis of mono‐, di‐, tri‐ and tetraalkynylated tricarbonyl(cyclobutadiene)iron complexes is accomplished by a repetitive metalation/iodination/coupling sequence. Application of this sequence leads to the synthesis of oligomeric cyclobutadiene complexes with various topologies, inter alia to the synthesis of a perethynylated dimer 24 . Alternatively a one‐step coupling procedure (Stille‐Farina) has been used to synthesize tetraalkynylated tricarbonyl(cyclobutadiene)‐irons 26 .