Nickel-catalyzed enantioselective cross-couplings of racemic secondary electrophiles that bear an oxygen leaving group.
Nickel-catalyzed enantioselective cross-couplings of racemic secondary electrophiles that bear an oxygen leaving group.
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镍催化带有氧离去基团的外消旋二级亲电子试剂的对映选择性交叉偶联。
DOI:
10.1021/ja300031w
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发表时间:
2012-02-15
影响因子:
15
通讯作者:
Fu, Gregory C.
中科院分区:
文献类型:
--
作者:
Oelke, Alexander J.;Sun, Jianwei;Fu, Gregory C.
To date, effective nickel-catalyzed enantioselective cross-couplings of alkyl electrophiles that bear oxygen leaving groups have been limited to reactions of allylic alcohol derivatives with Grignard reagents. In this report, we establish that, in the presence of a nickel/pybox catalyst, a variety of racemic propargylic carbonates are suitable partners for asymmetric couplings with organozinc reagents. The method is compatible with an array of functional groups and uti-lizes commercially available catalyst components. The development of a versatile nickel-catalyzed enantioselective cross-coupling process for electrophiles that bear a leaving group other than a halide adds a significant new dimension to the scope of these reactions.
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