Treatment of the N-4,5-hexadienyl carbamate 2a with a catalytic 1:2 mixture of [(S)-1]Au2Cl2[(S)-1 = (S)-3,5-t-Bu-4-MeO-MeOBIPHEP] and AgClO4 in m-xylene at -40 degrees C for 24 h led to isolation of 2-vinylpyrrolidine 3a in 97% yield with 81% ee. Gold(I)-catalyzed enantioselective hydroamination was effective for a number of carbamate groups and tolerated terminal disubstitutution of the allenyl moiety.
机构:
Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637, United StatesDepartment of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637, United States
Zhang, Junliang
Yang, Cai-Guang
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机构:
Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637, United StatesDepartment of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637, United States
Yang, Cai-Guang
He, Chuan
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Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637, United StatesDepartment of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, IL 60637, United States
He, Chuan
Journal of the American Chemical Society,
2006,
128
(06):
: 1798
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1799