期刊
CHEMICAL COMMUNICATIONS
卷 54, 期 74, 页码 10511-10514出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cc06416d
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A highly enantioselective [2+2] cycloaddition reaction of alkylidene malonates with the internal C?C bond of N-allenamides was developed with a Mg-II/N,N-dioxide complex as a catalyst. Various polysubstituted methylenecyclobutanes were afforded in good yields (up to 99%) and excellent enantioselectivities (up to 96% ee) under mild conditions. The utility of the donor-acceptor cyclobutane product was demonstrated as a masked 1,4-dipole in the formal [4+2] annulation reaction with a silyl enol ether.
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