Asymmetric Synthesis of Inhibitors of Glycinamide Ribonucleotide Transformylase

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• 作者：Jessica K. DeMartino ; Inkyu Hwang ; Stephen Connelly ; Ian A. Wilson ; Dale L. Boger
• 刊名：Journal of Medicinal Chemistry
• 出版年：2008
• 出版时间：September 11, 2008
• 年：2008
• 卷：51
• 期：17
• 页码：5441-5448
• 全文大小：174K
• 年卷期：v.51,no.17(September 11, 2008)
• ISSN：1520-4804

文摘

Glycinamide ribonucleotide transformylase (GAR Tfase) catalyzes the first of two formyl transfer steps in the de novo purine biosynthetic pathway that require folate cofactors and has emerged as a productive target for antineoplastic therapeutic intervention. The asymmetric synthesis and evaluation of the two diastereomers of 10-methylthio-DDACTHF (10R-3 and 10S-3) and related analogues as potential inhibitors of GAR Tfase are reported. This work, which defines the importance of the C10 stereochemistry for this class of inhibitors of GAR Tfase, revealed that both diastereomers are potent inhibitors of rhGAR Tfase (10R-3 K_i = 210 nM, 10S-3 K_i = 180 nM) that exhibit effective cell growth inhibition (CCRF-CEM IC₅₀ = 80 and 50 nM, respectively), which is dependent on intracellular polyglutamation by folylpolyglutamate synthetase (FPGS) but not intracellular transport by the reduced folate carrier.