Synthesis of a Tetronic Acid Library Focused on Inhibitors of Tyrosine and Dual-Specificity Protein Phosphatases and Its Evaluation Regarding VHR and Cdc25B Inhibition
作者:Mikiko Sodeoka、Ruriko Sampe、Sachiko Kojima、Yoshiyasu Baba、Takeo Usui、Kazunori Ueda、Hiroyuki Osada
DOI:10.1021/jm0100741
日期:2001.9.1
tetronic acid derivatives were synthesized and evaluated as inhibitors of the dual-specificity protein phosphatases VHR and cdc25B. Several compounds are found to be potentinhibitors of cdc25B, which is a key enzyme for cell-cycle progression. The promising results described herein strongly indicated that this tetronic acidlibrary is potent as a libraryfocused on the PTP/DSP-selective inhibitor.
Asymmetric synthesis of RK-682 and its analogs, and evaluation of their protein phosphatase inhibitory activities
作者:Mikiko Sodeoka、Ruriko Sampe、Terumi Kagamizono、Hiroyuki Osada
DOI:10.1016/s0040-4039(96)02029-1
日期:1996.11
We report an asymmetric synthesis of a potent tyrosine phosphatase inhibitor, RK-682 and its analogs. The absolute stereochemistry of RK-682 was determined to be (R). The inhibitory activities of RK-682 and its analogs, (R)-1a, (S)-1a, (R)-1b and (R)-1c toward various protein phosphatases (MIR, cdc25A, cdc25B, and PP1) are also reported. Copyright (C) 1996 Elsevier Science Ltd
Asymmetric Synthesis of a 3-Acyltetronic Acid Derivative, RK-682, and Formation of Its Calcium Salt during Silica Gel Column Chromatography.
RK-682 was reported to be a potent protein tyrosine phosphatase inhibitor. We found that (R)-3-hexadecanoyl-5-hydroxymethyltetronic acid (1) was easily converted to its calcium salt during column chromatography on Silica gel 60, and this calcium salt was identical to RK-682 originally isolated from a natural source. Here we report details of the asymmetric synthesis of (R)-1 and its conversion to the calcium salt. Fast atom bombardment mass spectrometric (FAB-MS) analysis of the free and calcium salt forms of RK-682 is also reported.