41468-36-4Relevant articles and documents
Syntheses of Phosphonic- and Phosphinic Analogues of Pantothenic Acid Ethyl Ester and of the Phosphonic Analogue of Pantetheine
Neidlein, Richard,Greulich, Peter
, p. 2545 - 2552 (1992)
The replacement of amino acids in peptides by phosphono-analogous (aminoalkyl)phosphonic acids 1, (2-aminoethyl)phosphonic acid (2) and substituted derivatives has been an important aspect of peptides research in the last years.In pantothenic acid (3), there is a peptide linkage between (2R)-2,4-dihydroxy-3,3-dimethylbutyric acid and the amino group of β-alanine, and in pantetheine (4), there is a second peptide linkage between the β-alanine and cysteamine.The synthesis of phosphono and phosphino analogues of pantothenic acid ethyl ester, where the β-alanine is replaced by the diethyl ester of (2-aminoethyl)phosphonic acid and the ethyl ester of (2-aminoethyl)methylphosphonic acid, respectively, and the syntheses of the phosphono analogue of pantetheine, where the β-alanine is replaced by (2-aminoethyl)phosphonic acid, are described.
H2dpa derivatives containing pentadentate ligands: An acyclic adjuvant potentiates meropenem activity in vitro and in vivo against metallo-β-lactamase-producing Enterobacterales
Bai, Mengmeng,Chen, Fangfang,Du, Juan,Kong, Hongtao,Liu, Wentian,Qin, Shangshang,Yao, Hong,Zhang, En,Zhang, Tingting
supporting information, (2021/07/28)
The emergence and dissemination of metallo-β-lactamases (MBLs) producing Enterobacterales is a great concern for public health due to the limited therapeutic options. No MBL inhibitors are currently available in clinical practice. Herein, we synthesized a series of H2dpa derivatives containing pentadentate-chelating ligands and evaluated their inhibitory activity against MBLs. Related compounds inhibited clinically relevant MBLs (Imipenemase, New Delhi metallo-β-lactamase (NDM) and Verona integron-encoded metallo-β-lactamase) with IC50 values of 1–4.9 μM. In vitro, the most promising compounds, 5b and 5c, which had a chiral methyl at the acid adjacent to 5a, demonstrated potent synergistic activity against engineered strains, with fractional inhibitory concentration index values as low as 0.07–0.18. The addition of 5b and 5c restored meropenem efficacy against 42 MBL-producing Enterobacterales and Pseudomonas aeruginosa to satisfactory clinical levels. In addition, safety tests revealed that 5b/5c showed no toxicity in red blood cells, cell lines or mouse model. Further studies demonstrated that compounds 5b and 5c were non-competitive MBL inhibitors. In vivo compounds 5b and 5c potentiated meropenem efficacy and increased the survival rate from 0 to at least 83% in mice with sepsis caused by an NDM-1-positive clinical strain. The activity of the compounds exhibited consistency at the molecular, cellular, and in vivo levels. These data indicated that H2dpa derivatives 5b and 5c containing pentadentate-chelating ligands may be worthy of further study.
Dipicolinate Complexes of Gallium(III) and Lanthanum(III)
Weekes, David M.,Ramogida, Caterina F.,Jaraquemada-Peláez, Maria De Guadalupe,Patrick, Brian O.,Apte, Chirag,Kostelnik, Thomas I.,Cawthray, Jacqueline F.,Murphy, Lisa,Orvig, Chris
supporting information, p. 12544 - 12558 (2016/12/26)
Three dipicolinic acid amine-derived compounds functionalized with a carboxylate (H3dpaa), phosphonate (H4dppa), and bisphosphonate (H7dpbpa), as well as their nonfunctionalized analogue (H2dpa), were successful