Gold(I)-catalyzed intramolecular dihydroamination of allenes with N,N'-disubstituted ureas to form bicyclic imidazolidin-2-ones.
Gold(I)-catalyzed intramolecular dihydroamination of allenes with N,N'-disubstituted ureas to form bicyclic imidazolidin-2-ones.
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DOI:
10.1021/ol900730w
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发表时间:
2009-06-18
期刊:
影响因子:
5.2
通讯作者:
Widenhoefer RA
中科院分区:
文献类型:
--
作者:
Li H;Widenhoefer RA
Reaction of N-δ-allenyl urea 1 with a catalytic 1:1 mixture of gold(I) N-heterocyclic carbene complex (5)AuCl [5 = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidine] and AgPF6 at room temperature for 2 h led to isolation of bicyclic imidazolidin-2-one 4 in 93% yield as a single diastereomer. Gold-catalyzed dihydroamination was effective for a number of N-δ- and N-γ-allenyl ureas to form the corresponding bicyclic imidazolidin-2-ones in good yield with high diastereoselectivity.
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