Total Synthesis of Tambromycin by Combining Chemocatalytic and Biocatalytic C-H Functionalization

Angewandte Chemie
Xiao ZhangHans Renata

Abstract

A combination of genomic and metabolomic approaches recently resulted in the identification of a nonribosomal tetrapeptide tambromycin, which possesses promising antiproliferative activity and several unusual structural features, including a densely substituted indole, a methyloxazoline ring, and an unusual pyrrolidine-containing amino acid called tambroline. In this work, we identify a concise synthetic route to access tambromycin, which relies on the strategic use of biocatalytic and chemocatalytic C-H functionalization methods to prepare two key precursors to the natural product in an efficient and scalable manner. The success of our study highlights the benefits of applying the principles of biocatalytic retrosynthesis as well as C-H functionalization logic to the synthesis of complex molecular scaffolds.

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