Synclinal and anticlinal isomers of the iron methoxycarbene complex [{η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)Fe(CO)<sub>2</sub>(CHOMe)]<sup>+</sup>; access to functional compounds
作者:Véronique Guerchais、Claude Lapinte
DOI:10.1039/c39860000894
日期:——
The methoxymethyl complex (η5-C5Me5)Fe(CO)2(CH2OMe)(2) undergoes hydride abstraction with Ph3C+PF6â at â80 °C and affords the secondary methoxycarbene complex [(η5-C5Me5)Fe(CO)2(CHOMe)]+PF6â(1) as a mixture of two geometric isomers of which the syn form isomerizes upon warming; complex (1) adds PPh3 yielding quantitatively [(η5-C5Me5)Fe(CO)2(CHOMePPh3)]+PF6â(3), and converts Me2PhSiH into Me2PhSiCH2OMe (4), giving in the presence of the appropriate alkenes, the alkenes, complexes [(η5-C5Me5)Fe(CO)2(CH2CHR)]+PF6â(5).
甲氧基甲基络合物(δ-5-C5Me5)Fe(CO)2(CH2OMe)(2)与 Ph3C+PF6â 在â80°C 时发生氢化物萃取反应,生成二级甲氧基羰基络合物[(δ-5-C5Me5)Fe(CO)2(CHOMe)]+PF6â(1),它是两种几何异构体的混合物,其中同步形式在升温后发生异构化;复合物 (1) 加入 PPh3 后,定量生成 [(δ-5-C5Me5)Fe(CO)2(CHOMePPh3)]+PF6â(3) ,并将 Me2PhSiH 转化为 Me2PhSiCH2OMe (4),在适当的烯烃存在下,生成烯烃复合物 [(δ-5-C5Me5)Fe(CO)2(CH2CHR)]+PF6â(5) 。