The reaction of the isolated (η5-pentadienyl)tricarbonyliron cation 2 with trimethylphosphite gives not only the (η4-butadienyl)tricarbonyliron phosphates 1 and 6 but also the σ-π allyl derivative 7; the unusual regioselectivity of this nucleophilic addition is attributed to the presence of the ester group in 2. A new and efficient synthesis of 1 has been devised based upon the in situ trapping of
Reactivity of acyclic (pentadienyl)iron(1+) cations: Synthetic studies directed toward the frondosins
作者:Do W. Lee、Rajesh K. Pandey、Sergey Lindeman、William A. Donaldson
DOI:10.1039/c1ob05720k
日期:——
[1-methoxycarbonyl-5-(2′,5′-dimethoxyphenyl)pentadienyl]Fe(CO)3+ cation was prepared in two steps from (methyl 6-oxo-2,4-hexadienoate)Fe(CO)3. Reaction of this cation with isopropenyl Grignard or cyclohexenyllithium reagents affords (2-alkenyl-5-aryl-1-methoxycarbonyl-3-pentene-1,5-diyl)Fe(CO)3 along with other addition products. Oxidative decomplexation of these (pentenediyl)iron complexes, utilizing CuCl2, affords
A shortened synthesis of optically pure tricarbonyl(methyl 6-oxo-2,4-hexadienoate)iron leading to improved yield
作者:William A Donaldson、Rajesh K Pandey、Sergey Lindeman
DOI:10.3998/ark.5550190.0011.404
日期:——
The (+)and (–)-enantiomers of tricarbonyl[methyl (2E,4E)-6-oxo-2,4-hexadienoate]iron are prepared in 4 steps from commercially available hexadienal (26% and 25% yields, respectively).
Synthesis and reactivity of tricarbonyl(1-methoxycarbonyl-5-phenylpentadienyl)iron(1+) cation
作者:Subhabrata Chaudhury、William A. Donaldson、Dennis W. Bennett、Daniel T. Haworth、Tasneem A. Siddiquee、Jennifer M. Kloss
DOI:10.1016/j.jorganchem.2004.01.010
日期:2004.5
Tricarbonyl(1-methoxycarbonyl-5-phenylpentadienyl)iron(1+) hexafluorophosphate (7) was prepared in two steps from tricarbonyl(methyl 6-oxo-2,4-hexadienoate)iron. While addition of carbon and heteroatom nucleophiles to 7 generally occurs at the phenyl-substituted dienyl carbon to afford (2,4-dienoate)iron products, the addition of phthalimide proceeded at C2 to afford a (pentenediyl)iron product (18)