Regio- and stereocontrolled functionalization of cycloheptadiene using organoiron and organoselenium chemistry
作者:Anthony J. Pearson、Sandra L. Kole、Tapan Ray
DOI:10.1021/ja00332a050
日期:1984.10
Etude des complexes cycloheptadienyl-fer carbonyles: reactivite, conformation, enlevement du metal et cyclofonctionalisation desdienes obtenus
Etude des complexes cycloheptadienyl-fer carbonyles:reactivite,conformation,enlevement du metal et cyclofonctionalisation des diene obtenus
Kinetics and mechanism of mono- and di-olefin exchange at five-co-ordinate iron(0)
作者:Philip M. Burkinshaw、Denis T. Dixon、James A. S. Howell
DOI:10.1039/dt9800000999
日期:——
Exchange of various mono-olefins with styrene in [Fe(CO)4(PhCHCH2)] proceeds via a dissociative process, involving an Fe(CO)4 intermediate. Ligand exchange in system (i)(enone = benzylideneacetone, cinnamaldehyde, chalcone, or dypnone; polyene = cyclohexa- and cyclohepta-1,3-diene, cycloheptatriene, cycle-octatetraene, [Fe(CO)3(η4-enone)]+ polyene ⇌[Fe(CO)3(η4-polyene)]+ enone (i) or 1,4-diphenylbuta-1
Natural products synthesis using organoiron complexes
作者:A. J. Pearson
DOI:10.1351/pac198355111767
日期:1983.1.1
utilisation of cyclohexadienyl—Fe(CO)3 complexes of type 1 which we have now established as synthetic equivalents of cyclohexenone— y—cations (1), e.g. 2. Thus, reaction of lwith nucleophiles usually occurs regioselectively to give complexes of type 3, which are readily converted to cyclohexenones 4. It is appropriate to discuss the application of this concept to a total synthesis of the Aspidosperma alkaloid
Preparation and isomerisation of carbonyl(η-cyclohepta-1,4-diene)(η-cyclohexa-1,3-diene) iron complexes
作者:Brian F. G. Johnson、Jack Lewis、Ian E. Ryder、Martyn V. Twigg
DOI:10.1039/dt9760000421
日期:——
r.) on, this complex indicate that nucleophilic addition has taken place at the exo-3-position, and that the endo-hydrogen atom migrates during the isomerisation process. Addition of cyanide ion to the complex cation also takes place at the exo-3-position, and the product rearranges to the η-2-substituted-1,3-diene complex ca. 5 times more rapidly than the unsubstituted complex. Complex (II) reacts
用水中的Na [BH 4 ]还原[Fe(C 6 H 8)(C 7 H 9)(CO)] +,(I)产生[Fe(η-1,3- C6 H 8) (η-1,4-C 7 H ^ 10) - (CO)],(II),以良好的收率连同一些的[Fe(η-1,3--C 7 H ^ 10)(CO)],(III) 。加热时,(II)(以固体或溶液形式)经历异构化为(III)和一些[Fe(η-1,3- C6 H 8)(1-σ,3–5-η-C 7 H 10)(CO)]。在正庚烷中,在40–70°C的温度范围内研究了这一一级反应的动力学,并将结果与相关系统进行了比较。用Na [BD 4 ]还原(I)得到单氘代的η-环庚-1,4-二烯配合物。对该络合物的反应和光谱学研究(尤其是1 H和13 C nmr)表明,亲核加成发生在exo -3-位置,并且内氢原子在异构化过程中迁移。也将氰化物离子加到络合物阳离子上的exo -3-位置,产物重排成η-2-取代的-1
Evidence for correlated rotation and diastereoisomer discrimination in (η4-diene)Fe(CO)2L complexes: the crystal and solution structures of (cyclohexadiene)Fe(CO)2P(o-tolyl)3 and (cycloheptadiene)Fe(CO)2(+)-PPh2(neomenthyl)
作者:James A.S. Howell、Michael G. Palin、Marie-Claire Tirvengadum、Desmond Cunningham、Patrick McArdle、Zeev Goldschmidt、Hugo E. Gottlieb
DOI:10.1016/0022-328x(91)80056-p
日期:1991.8
The solid state structure of (cyclohexadiene)Fe(CO)2P(o-tolyl)3 reveals an exo2 conformation for the phosphine. In solution, arene ring exchange in the phosphine and exchange of phosphine between equivalent basal positions of the square pyramid occur at equal rates. In solution, (cycloheptadiene)Fe(CO)2(+)-PPh2(neomenthyl) exhibits a diastereoselection between basal isomers, and crystallizes as a single