The Chemistry of Metallacyclic Alkenylcarbene Complexes, 8 Chelated Allyl‐Ironcarbene Complexes with a Centrally Tethered π‐Ligand‐Synthesis and Reactions with Nucleophiles
作者:Walter Förtsch、Frank Hampel、Rainer Schobert
DOI:10.1002/cber.19971300709
日期:1997.7
The title complexes 8 and 9 are easily prepared in two or three steps from iron carbonyls and isobutene diol 5 by Meerwein alkylation of the intermediate acyl complexes 6 and 7. With carbon and heteroatom nucleophiles like enolates and triphenylphosphane they form either stable 4-substituted alkene-carbene complexes 10 and 11, or substituted trimethylenemethane tricarbonyliron complexes like 12. Oxidation
通过中间酰基配合物6和7的Meerwein烷基化,易于从羰基铁和异丁烯二醇5分两步或三步制备标题配合物8和9。与碳和杂原子亲核试剂(如烯酸酯和三苯基膦)形成稳定的4位取代的烯烃-卡宾配合物10和11,或取代的三亚甲基三羰基铁配合物(如12)。氧化用H 2 ö 2 / NaOH调节两者烯烃-卡宾配合物的11和由8与烯醇锂反应得到的稳定性较差的β-氧代取代的三亚甲基-甲烷络合物13,产生相应的取代的氨基甲酸烯丙酯15或烯丙醇14,它们分别是形式上双-和单取代的衍生物,起始异丁烯二醇的量。