Novel omega-oxygenated vitamin K(2) analogues were efficiently synthesized and their biological activities were evaluated. Some were biologicallyactive and the side-chain played an important role in gamma-carboxylation and apoptosis-inducing activity. The results provide useful information on the structure-activity relationship of vitamin K(2) analogues for the development of new drugs.
Efficient synthesis and biological evaluation of ω-oxygenated analogues of vitamin K2: Study of modification and structure–activity relationship of vitamin K2 metabolites
Novel omega-oxygenated vitamin K-2 analogues, which are candidates for metabolites of vitamin K-2 homologues, were efficiently synthesized and their apoptosis-inducing activity was evaluated. We revealed that some of those analogues were biologically active and the side-chain part played an important role in apoptosis-inducing activity. Our results can provide useful information to develop the structure-activity relationship of vitamin K-2 analogues for new drugs based on vitamin K. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis of Novel Synthetic Vitamin K Analogues Prepared by Introduction of a Heteroatom and a Phenyl Group That Induce Highly Selective Neuronal Differentiation of Neuronal Progenitor Cells
We synthesized novel vitamin K2 analogues that incorporated a heteroatom and an aromatic ring in the side chain and evaluated their effect on the selective differentiation of neuronal progenitor cells into neurons in vitro. The results showed that a menaquinone-2 analogue bearing a p-fluoroaniline had the most potent activity, which was more than twice as great as the control. In addition, the neuronal