Chiral Squaramide‐Catalyzed Asymmetric Mannich Reactions for Synthesis of Fluorinated 3,3′‐Bisoxindoles

A squaramide‐catalyzed asymmetric Mannich reaction of 3‐fluorooxindoles to isatin‐derived imines for synthesis of fluorinated 3,3′‐bisoxindoles with two contiguous stereocenters under mild conditions was developed. The corresponding 3,3′‐bisoxindoles were obtained in excellent yields with excellent...

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Published inAdvanced synthesis & catalysis Vol. 360; no. 16; pp. 3164 - 3170
Main Authors Li, Bing‐Yu, Du, Da‐Ming
Format Journal Article
LanguageEnglish
Published WEINHEIM Wiley 17.08.2018
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Abstract A squaramide‐catalyzed asymmetric Mannich reaction of 3‐fluorooxindoles to isatin‐derived imines for synthesis of fluorinated 3,3′‐bisoxindoles with two contiguous stereocenters under mild conditions was developed. The corresponding 3,3′‐bisoxindoles were obtained in excellent yields with excellent diastereo‐ and enantioselectivities (up to 99% yield, >99:1 dr and >99% ee). What's more, this reaction can be gram‐scaled without compromising yield and stereoselectivity.
AbstractList A squaramide‐catalyzed asymmetric Mannich reaction of 3‐fluorooxindoles to isatin‐derived imines for synthesis of fluorinated 3,3′‐bisoxindoles with two contiguous stereocenters under mild conditions was developed. The corresponding 3,3′‐bisoxindoles were obtained in excellent yields with excellent diastereo‐ and enantioselectivities (up to 99% yield, >99:1 dr and >99% ee). What's more, this reaction can be gram‐scaled without compromising yield and stereoselectivity.
A squaramide‐catalyzed asymmetric Mannich reaction of 3‐fluorooxindoles to isatin‐derived imines for synthesis of fluorinated 3,3′‐bisoxindoles with two contiguous stereocenters under mild conditions was developed. The corresponding 3,3′‐bisoxindoles were obtained in excellent yields with excellent diastereo‐ and enantioselectivities (up to 99% yield, >99:1  dr and >99% ee ). What's more, this reaction can be gram‐scaled without compromising yield and stereoselectivity. magnified image
A squaramide-catalyzed asymmetric Mannich reaction of 3-fluorooxindoles to isatin-derived imines for synthesis of fluorinated 3,3-bisoxindoles with two contiguous stereocenters under mild conditions was developed. The corresponding 3,3-bisoxindoles were obtained in excellent yields with excellent diastereo- and enantioselectivities (up to 99% yield, >99:1dr and >99% ee). What's more, this reaction can be gram-scaled without compromising yield and stereoselectivity.
Author Li, Bing‐Yu
Du, Da‐Ming
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  fullname: Du, Da‐Ming
  email: dudm@bit.edu.cn
  organization: Beijing Institute of Technology
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Issue 16
Keywords 3,3-DISUBSTITUTED OXINDOLES
VINYL SULFONE
ACIDS
REACTIVITY
3-HALOOXINDOLES
Asymmetric catalysis
Organocatalysis
MEDICINAL CHEMISTRY
3-FLUOROOXINDOLES
EFFICIENT ACCESS
Mannich addition
ENANTIOSELECTIVE CONJUGATE ADDITION
CONSTRUCTION
Squaramides
Bisoxindoles
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Snippet A squaramide‐catalyzed asymmetric Mannich reaction of 3‐fluorooxindoles to isatin‐derived imines for synthesis of fluorinated 3,3′‐bisoxindoles with two...
A squaramide-catalyzed asymmetric Mannich reaction of 3-fluorooxindoles to isatin-derived imines for synthesis of fluorinated 3,3-bisoxindoles with two...
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SubjectTerms Asymmetric catalysis
Bisoxindoles
Chemical reactions
Chemical synthesis
Chemistry
Chemistry, Applied
Chemistry, Organic
Fluorination
Imines
Mannich addition
Organocatalysis
Physical Sciences
Science & Technology
Squaramides
Stereoselectivity
Title Chiral Squaramide‐Catalyzed Asymmetric Mannich Reactions for Synthesis of Fluorinated 3,3′‐Bisoxindoles
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