Volume 54, Issue 22 pp. 6618-6621
Communication

A Modular Approach to the Total Synthesis of Tunicamycins

Dr. Jiakun Li

Dr. Jiakun Li

State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 (China)

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Prof. Biao Yu

Corresponding Author

Prof. Biao Yu

State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 (China)

State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 (China)Search for more papers by this author
First published: 14 April 2015
Citations: 83

This work was supported by the National Natural Science Foundation of China (21372253 and 21432012) and the Ministry of Science and Technology of China (2012ZX09502-002).

Graphical Abstract

The modular and stereoselective synthesis of tunicamycins features a Mukaiyama aldol reaction, intramolecular acetal formation, gold(I)-catalyzed O and N glycosylation, and final N acylation as the key steps. These natural products are a unique type of nucleoside antibiotics with potent inhibitory activities against bacterial cell-wall synthesis and the N-glycosylation of eukaryotic proteins.

Abstract

The tunicamycins constitute a delicate mimic of the bisubstrate intermediates of N-acetyl-D-hexosamine-1-phosphate translocases and thus inhibit bacterial cell-wall synthesis and the N glycosylation of eukaryotic proteins. An efficient approach to the synthesis of this unique type of nucleoside antibiotics is now reported and features the assembly of five modules in a highly stereoselective and robust manner. A Mukaiyama aldol reaction, intramolecular acetal formation, gold(I)-catalyzed O and N glycosylation, and final N acylation were used as the key steps.

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