期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 21, 期 48, 页码 17210-17214出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201503243
关键词
alder-ene reaction; allenic C-H bonds; azodicarboxylates; bond dissociation energy; silylallenes
资金
- UIC (LAS AFS)
- NSF [CHE-0955972]
- TACOMA Technology
- Zhejiang Provincial NSF [LY13B020007]
- NNSF of China [21372178]
Facile and selective Alder-ene reactions of silyl-allenes involving the activation of an allenic C(sp(2))-H over an allylic C(sp(3))-H bond is described. In this ene reaction, the presence of a silyl substituent was found to be critical for the observed reactivity and selectivity since the corresponding alkyl-substituted allenes show different reaction profiles. Computational studies show that the origin of this unusual reactivity is the lower bond dissociation energy of the alpha-C(sp(2))-H bond in silylallenes compared to the corresponding nonsilylated allenes.
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