Synthesis of 15N-labeled vicinal diamines through N-activated chiral aziridines: tools for the NMR study of platinum-based anticancer compounds
摘要:
A new method for the synthesis of N-15-labeled chiral beta-diamines from a common precursor, either optically pure amino acids or anti-beta-amino alcohols, is reported. The two diastereomeric series of vicinal diamines are produced through the nucleophilic ring opening of activated chiral aziridines. N-15 was introduced by means of [N-15]-benzylamine, prepared from (NH4Cl)-N-15. The final compounds are highly valuable because [H-1-N-15] NMR is considered a powerful tool for studying the chemical properties of platinum-based complexes. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis and Antitumor Activity of Enantiomerically Pure [1, 2-Diamino-1-(4-fluorophenyl) propane]dichloroplatinum(II) Complexes
摘要:
Enantiomericaily pure 1,2-diamino-1-(4-fluorophenyl)propanes were synthesized by stereospecific and stereoselective procedures by use of the (1R,2S)- and (1S,2R)-2-amino-1-(4-fluorophenyl)propanols (12a) as intermediates. The enantiomeric purity was determined by H-1 NMR spectroscopy after conversion of the propanolamines and the diamines with (1R)-myrtenal into mono- and diimines. For the coordination to platinum the diamines were reacted with K2PtCl4. The resulting dichloroplatinum(II) complexes 4F-Ph/Me-PtCl2 were tested for antiproliferative activity on the MCF-7 breast cancer cell line. (SS)- and (RR)-4F-Ph/Me-PtCl2 produced the strongest inhibitory effect. Both complexes showed cytocidal effects, (SS)-4F-Ph/Me-PtCl2 even in a concentration of 1 muM. The (1S,2R)- and (1R,2S)-configurated complexes were far less active (SS>RR>RS=SR) and comparable in this respect with the standard cisplatin.
Design, synthesis of auristatins-glucuronide conjugates targeting the β-glucuronidase in tumor microenvironment
作者:Yujie Wang、Keshi Xu、Hongchun Liu、Wei Zhang、Chun Hu、Yingxia Li
DOI:10.1016/j.bmcl.2023.129493
日期:2023.10
Auristatins-glucuronide conjugates designed targeting the β-Glucuronidase in tumor microenvironment were synthesized and evaluated on stabilities, the release of auristatins and the antitumor activities in this study. Conjugates 20 and 21 showed remarkable stabilities in phosphate buffer and bovine serum solution, and excellent selectivity between the in vitro antiproliferative activities against β-glucuronidase
A new method for the synthesis of N-15-labeled chiral beta-diamines from a common precursor, either optically pure amino acids or anti-beta-amino alcohols, is reported. The two diastereomeric series of vicinal diamines are produced through the nucleophilic ring opening of activated chiral aziridines. N-15 was introduced by means of [N-15]-benzylamine, prepared from (NH4Cl)-N-15. The final compounds are highly valuable because [H-1-N-15] NMR is considered a powerful tool for studying the chemical properties of platinum-based complexes. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis and Antitumor Activity of Enantiomerically Pure [1, 2-Diamino-1-(4-fluorophenyl) propane]dichloroplatinum(II) Complexes
Enantiomericaily pure 1,2-diamino-1-(4-fluorophenyl)propanes were synthesized by stereospecific and stereoselective procedures by use of the (1R,2S)- and (1S,2R)-2-amino-1-(4-fluorophenyl)propanols (12a) as intermediates. The enantiomeric purity was determined by H-1 NMR spectroscopy after conversion of the propanolamines and the diamines with (1R)-myrtenal into mono- and diimines. For the coordination to platinum the diamines were reacted with K2PtCl4. The resulting dichloroplatinum(II) complexes 4F-Ph/Me-PtCl2 were tested for antiproliferative activity on the MCF-7 breast cancer cell line. (SS)- and (RR)-4F-Ph/Me-PtCl2 produced the strongest inhibitory effect. Both complexes showed cytocidal effects, (SS)-4F-Ph/Me-PtCl2 even in a concentration of 1 muM. The (1S,2R)- and (1R,2S)-configurated complexes were far less active (SS>RR>RS=SR) and comparable in this respect with the standard cisplatin.