期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 14, 期 33, 页码 10348-10356出版社
WILEY-BLACKWELL
DOI: 10.1002/chem.200800536
关键词
chemoselective metalation; halogen-metal exchange; nucleophilic substitution; polymerization; zinc
资金
- Hoansha
- KAKENHI
We present full details of the unique reactivities of the newly developed dianion-type bulky zincate, dilithium tetra-tert-butylzincate (tB(4),ZnLi2). With this reagent, halogen-zine exchange reaction of variously functionalized haloaromatics and anionic polymerization of N-isopropyl-acrylamide (NIPAm)/styrene with excellent chemoselectivity were realized. Halogen-zinc exchange reaction followed by electrophilic trapping with propargyl bromide provided a convenient route to functionalized phenylallenes, particularly those with electrophilic functional groups (such as cyano, amide and halogens). Spectral and computational studies of the structure in the gas and liquid phases indicated extraordinary stabilization of this dianion-type zincate by its bulky ligands.
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