Stereoselective elaboration of the acyl ligand in (η5-C5H5)Fe(CO)(PPh3)(COCH2R) via the alkylation of the anions [(η5-C5H5)Fe(CO)(PPh3)(COCHR)]Li (R = Me, Et)
Substituent effects in dimethylsulfoxide-promoted carbon monoxide insertion into iron-alkyl bonds
作者:J.D. Cotton、G.T. Crisp、Latifah Latif
DOI:10.1016/s0020-1693(00)89325-1
日期:1981.1
The insertion reaction of carbon monoxide, induced by dimethylsulfoxide, into iron-carbon sigma bonds in the complexes, [(η5-C5H5)(CO)2-FeR], has been extended to a wide variety of primary and secondary alkyl substituents. Rate constants for the forward (k1) and reverse (k-1) reactions, together with the second order rate constant (k2), for the further reaction of the solvated acyl complex with triphenylphosphine
Stereochemical control and mechanistic aspects of the alkylation of [(η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)Fe(L)(CO)(COCHR)]<sup>–</sup>Li<sup>+</sup>(L = PPh<sub>3</sub>, PPh<sub>2</sub>NEt<sub>2</sub>; R = Me, Et): X-ray crystal structure of [(η<sup>5</sup>-C<sub>6</sub>H<sub>5</sub>)Fe(PPh<sub>3</sub>)(CO){COCH(Me)Et}]
作者:Gordon J. Baird、Judith A. Bandy、Stephen G. Davies、Keith Prout
DOI:10.1039/c39830001202
日期:——
Determination of the molecular structure of [(η5-C5H5)Fe(PPh3)(CO)COCH(Me)Et}], formed in the diastereoselective methylation of [(η5-C5H5)Fe(PPh3)(CO)(COCHEt)]–Li+, allows the assignment of the relative configuration of the new chiral centre and indicates the origin of the high diastereoselectivities observed in this type of reaction.
的分子结构的测定[(η 5 -C 5 H ^ 5)的Fe(PPH 3)(CO)COCH(Me)中的Et}],形成在[(η的非对映选择性甲基化5 -C 5 H ^ 5)的Fe (PPh 3)(CO)(COCHEt)] – Li +,可以分配新的手性中心的相对构型,并指示在这种类型的反应中观察到的高非对映选择性的起源。
Transformations of chiral iron complexes used in organic synthesis. Reactions of .eta.5-CpFe(PPh3)(CO)COCH3 and related species leading to a mild, stereospecific synthesis of .beta.-lactams
作者:Lanny S. Liebeskind、Mark E. Welker、Richard W. Fengl
DOI:10.1021/ja00280a034
日期:1986.10
Alkylation and aldol reactions of iron acyl enolates