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Issue 24, 2013
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O-Benzoxazolyl imidates as versatile glycosyl donors for chemical glycosylation

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Abstract

Herein, we report a new class of glycosyl donors, benzoxazolyl imidates, for chemical glycosylation. The O-benzoxazolyl (OBox) leaving group was designed with an aim to compare the relative reactivity and stability of similarly structured S-benzoxazolyl (SBox) glycosides (thioimidates) developed in our lab and glycosyl trichloroacetimidates (TCAI, O-imidates) developed by Schmidt. Novel OBox donors can be activated under catalytic conditions and provided excellent yields in glycosylation. The OBox imidates were found to be more reactive than either SBox or TCAI donors. The high reactivity profile was confirmed in direct competitive experiments and was found beneficial for HPLC-assisted solid-phase synthesis.

Graphical abstract: O-Benzoxazolyl imidates as versatile glycosyl donors for chemical glycosylation

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Article information


Submitted
04 Apr 2013
Accepted
23 Apr 2013
First published
23 Apr 2013

Org. Biomol. Chem., 2013,11, 4068-4076
Article type
Paper

O-Benzoxazolyl imidates as versatile glycosyl donors for chemical glycosylation

S. S. Nigudkar, A. R. Parameswar, P. Pornsuriyasak, K. J. Stine and A. V. Demchenko, Org. Biomol. Chem., 2013, 11, 4068
DOI: 10.1039/C3OB40667A

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