Synlett 2012; 23(16): 2363-2366
DOI: 10.1055/s-0032-1317160
letter
© Georg Thieme Verlag Stuttgart · New York

Site-Selective Oxidation of Vitamin B12 Using 2-Iodoxybenzoic Acid

Susan Clardy-James
Department of Chemistry, Center for Science and Technology, Syracuse University, Syracuse, NY 13244-4100, USA    Fax: +1(315)4434070   Email: rpdoyle@syr.edu
,
Jaime L. Bernstein
Department of Chemistry, Center for Science and Technology, Syracuse University, Syracuse, NY 13244-4100, USA    Fax: +1(315)4434070   Email: rpdoyle@syr.edu
,
Deborah J. Kerwood
Department of Chemistry, Center for Science and Technology, Syracuse University, Syracuse, NY 13244-4100, USA    Fax: +1(315)4434070   Email: rpdoyle@syr.edu
,
Robert P. Doyle*
Department of Chemistry, Center for Science and Technology, Syracuse University, Syracuse, NY 13244-4100, USA    Fax: +1(315)4434070   Email: rpdoyle@syr.edu
› Author Affiliations
Further Information

Publication History

Received: 18 June 2012

Accepted after revision: 31 July 2012

Publication Date:
11 September 2012 (online)


Abstract

Reaction of vitamin B12 (B12) with excess 2-iodoxybenzoic acid and 2-hydroxypyridine leads to selective oxidation of the 5′-hydroxyl group of the ribose tail of B12 in a 30% isolated yield. The acid derivative was purified in one step by HPLC chroma­tography and characterized by MALDI-TOF mass spectrometry, 1H NMR and 2D (HSQC and HMBC) NMR. The new carboxylic acid derivative is perfectly suited to make stable amide-based B12 bioconjugates.

Supporting Information