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Gold and silver: A 1:2 mixture of [{(S)-1}(AuCl)2] and AgBF4 catalyzes the enantioselective hydroamination of chiral, racemic 1,3-disubstituted allenes with N-unsubstituted carbamates to form N-allylic carbamates in good yield, with high regio- and diastereoselectivity, and up to 92 % ee (see scheme, Cbz=benzyloxycarbonyl).
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Butler et al. (2012) studied this question.
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