1. Synthesis of the Isodityrosine Moiety of Seongsanamide A–D and Its Derivatives
- Author
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Yang Xie, Zhou Xu, Pei Hu, Xiao-Ting Tian, Yi-Hong Lu, Hao-Dong Jiang, Cheng-Gang Huang, and Zhi-Cai Shang
- Subjects
C(sp3)–H functionalization ,palladium ,arylation ,isodityrosine ,diaryl ether ,Biology (General) ,QH301-705.5 - Abstract
The concise and highly convergent synthesis of the isodityrosine unit of seongsanamide A–D and its derivatives bearing a diaryl ether moiety is described. In this work, the synthetic strategy features palladium-catalyzed C(sp3)–H functionalization and a Cu/ligand-catalyzed coupling reaction. We report a practical protocol for the palladium-catalyzed mono-arylation of β-methyl C(sp3)–H of an alanine derivative bearing a 2-thiomethylaniline auxiliary. The reaction is compatible with a variety of functional groups, providing practical access to numerous β-aryl-α-amino acids; these acids can be converted into various tyrosine and dihydroxyphenylalanine (DOPA) derivatives. Then, a CuI/N,N-dimethylglycine-catalyzed arylation of the already synthesized DOPA derivatives with aryl iodides is described for the synthesis of isodityrosine derivatives.
- Published
- 2023
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