Catalytic asymmetric γ-alkylation of carbonyl compounds via stereoconvergent Suzuki cross-couplings.
Catalytic asymmetric γ-alkylation of carbonyl compounds via stereoconvergent Suzuki cross-couplings.
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DOI:
10.1021/ja2079515
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发表时间:
2011-10-05
影响因子:
15
通讯作者:
Fu, Gregory C.
中科院分区:
文献类型:
--
作者:
Zultanski, Susan L.;Fu, Gregory C.
With the aid of a chiral nickel catalyst, enantioselective γ- (and δ-) alkylations of carbonyl compounds can be achieved through the coupling of γ-haloamides with alkylboranes. In addition to primary alkyl nucleophiles, for the first time for an asymmetric cross-coupling of an un-activated alkyl electrophile, an arylmetal, a boronate ester, and a secondary (cyclopropyl) alkylmetal compound are shown to couple with significant enantioselectivity. A mechanistic study indicates that cleavage of the carbon–halogen bond of the electrophile is irreversible under the conditions for asymmetric carbon–carbon bond formation.
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