Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 87, Issue 21, Pages 14706-14714Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.2c02029
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Funding
- NIH
- [5R01GM125920- 03]
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This study reports a new method for the synthesis of chiral quaternary alpha-aryl amino acid derivatives. The method involves a photoredox catalytic asymmetric Giese-type reaction and Clayden rearrangement, offering a reliable source for the assembly of highly demanding chiral building blocks.
Chiral quaternary alpha-aryl amino acids are biologically valued but synthetically challenging building blocks. Herein, we report a strategy for the synthesis of molecular architectures by unifying a photoredox catalytic asymmetric Giese-type reaction and Clayden rearrangement. A new class of chiral Karady-Beckwith dehydroalanines is designed and serves as a versatile handle for the photoredox-mediated highly stereoselective Giese-type reaction with feedstock carboxylic acids and tertiary amines. Subsequent Clayden rearrangement delivers chiral quaternary alpha-aryl amino acid derivatives with high stereoselectivity. The versatile approach offers a reliable source for the assembly of highly demanding chiral building blocks.
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