The Nature of the Ring-Opening Process in a Substituted Cyclopropylmethyliron Complex
作者:E. Alexander Hill、Baoju Li
DOI:10.1021/om970906m
日期:1998.6.1
CpFe(CO)(η3CH2CHCHCHMe2) (8). Ring-opening rearrangement in the sense to produce mainly 6 or 7 (with a primary σ-bonded alkyl group) rather than products derived from a tertiary σ-bonded alkyl group is most consistent with a concerted four-center organometallic rearrangement process. A radical route, previously proposed for the unsubstituted cyclopropylmethyl complex, is unlikely. Complex 4 also undergoes
The present invention is directed to small molecule inhibitors of the IgE response to allergens which are useful in the treatment of allergy and/or asthma or any diseases where IgE is pathogenic.