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Updated: Apr 26, 2026

Modification and Functionalization of the Guanidine Group by Tailor-made Precursors
Published on: April 27, 2017
Small alterations in cobinamide structure considerably influence sGC activation
Maciej Giedyk1, Keith ó Proinsias, Sylwester Kurcoń
1Institute of Organic Chemistry PAS, Kasprzaka 44/52, 01-224 Warsaw (Poland), Fax: (+48) 22-632-6681.
Abstract:
Specially designed B-ring-modified cobalamin derivatives were synthesized and tested as potential activators of soluble guanylyl cyclase (sGC). Herein, we disclose the influence of substituents at the c- and d-positions in hydrophilic and hydrophobic cobyrinic acid derivatives on their capacities to activate sGC. The presence of the amide group at c-/d-position in cobyrinic acid derivatives strongly influence the level of sGC activation. Removal of the d-position altogether has a profound effect for hydrophobic compounds. In contrast, little differences were observed in hydrophilic ones.
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