New Organocatalytic Asymmetric Synthesis of Highly Substituted Chiral 2-Oxospiro-[indole-3,4'- (1',4'-dihydropyridine)] Derivatives.

New Organocatalytic Asymmetric Synthesis of Highly Substituted Chiral 2-Oxospiro-[indole-3,4'- (1',4'-dihydropyridine)] Derivatives.
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DOI:
10.3390/molecules200915807
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发表时间:
2015-08-31
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Herrera RP
Herrera RP
中科院分区:
其他
文献类型:
--
作者:
Auria-Luna F;Marqués-López E;Mohammadi S;Heiran R;Herrera RP

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Herein, we report our preliminary results concerning the first promising asymmetric synthesis of highly functionalized 2-oxospiro-[indole-3,4′-(1′,4′-dihydropyridine)] via the reaction of an enamine with isatylidene malononitrile derivatives in the presence of a chiral base organocatalyst. The moderate, but promising, enantioselectivity observed (30%–58% ee (enantiomeric excess)) opens the door to a new area of research for the asymmetric construction of these appealing spirooxindole skeletons, whose enantioselective syntheses are still very limited.
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