Diketopyrrolopyrrole Bis‐Phosphonate Conjugate: A New Fluorescent Probe for In Vitro Bone Imaging
作者:Andrea Chiminazzo、Giuseppe Borsato、Alessia Favero、Chiara Fabbro、Charles E. McKenna、Luca Giuseppe Dalle Carbonare、Maria Teresa Valenti、Fabrizio Fabris、Alessandro Scarso
DOI:10.1002/chem.201805436
日期:2019.3.7
The synthesis of a conjugate molecule between an unusual red‐fluorescentdiketopyrrolopyrrole (DPP) unit and a bis‐phosphonate (BP) precursor by a click‐chemistry strategy to target bone tissue and monitor the interaction is reported. After thorough investigation, conjugation through a triazole unit between a γ‐azido rather than a β‐azido BP and an alkyne‐functionalized DPP fluorophore group turned
Design, synthesis and P-gp induction activity of aryl phosphonate esters: identification of tetraethyl-2-phenylethene-1,1-diyldiphosphonate as an orally bioavailable P-gp inducer
作者:Sudhakar Manda、Abubakar Wani、Sonali S. Bharate、Ram A. Vishwakarma、Ajay Kumar、Sandip B. Bharate
DOI:10.1039/c6md00300a
日期:——
considered as a potential therapeutic strategy for the treatment of Alzheimer's disease. The expression of P-gp is regulated through a nuclear receptor, pregnane X receptor (PXR). Thus, herein we investigated the potential of a known PXR activator, diphosphonate ester SR12813 (6a), for P-gp induction activity and further studied its structure–activity relationship. The diphosphonate ester SR12813 along
New Synthesis of<i>gem</i>-Bis(phosphono)ethylenes and their Applications
作者:Toru Minami、Susumu Inoue、Tatsuo Okauchi
DOI:10.1055/s-2003-41002
日期:——
Palladium-catalyzed cross-coupling reaction of α-phosphonovinyl nonafluorobutanesulfonates (nonaflates) 1 with dialkyl phosphites gave versatile intermediate reagents, gem-bis(phosphono)ethylenes 2a-d in 35-93% yields. The reaction of bis(diethylphosphono)ethylene (2a) with tribromomethyllithium to give the Michael adduct 3 was followed by treatment with potassium hydride to form 1,1-dibromo-2,2-bis(phosphono)cyclopropane 4 in 68% yield. The reaction of 2a with [N-(p-toluenesulfonyl)- or N-(methanesulfonyl)imino]phenyliodinane produced the corresponding 1-sulfonyl-2,2-bis(phosphono)aziridines 5a,b in 54-75% yields. Treatment of 2a with sodium or potassium imidazole and a halogenating agent led to [1-halo-2-(1-imidazolyl)ethyl]-1,1-bisphosphonates 7a,b (halogen = Cl, F) in 73-47% yields. Similar reaction using 3-lithiopyridine and a halogenating agent afforded [1-halo-2-(3-pyridyl)ethyl]-1,1-bisphosphonates 8a,b in 83-85% yields.
Dioxirane Oxidation of 2-Aryl-1-vinyl-1, 1-diphosphane Dioxide: A Convenient Approach for the Synthesis of Novel 1,2-Epoxy-2-aryl Ethyl<i>gem</i>bisphosphonates
Pyrrolidine-Containing Bisphosphonates as Potential Anti-Resorption Bone Drugs
作者:Lorena De Luca、Andrea Chiminazzo、Laura Sperni、Giorgio Strukul、Alessandro Scarso
DOI:10.1002/chem.201605878
日期:2017.3.8
simple and new synthetic methods are needed to expand their molecular complexity and also improve their specificity of action towards other targets as anticancer, antibacterial, and antimalarial drugs. Herein, we report a new class of potential antiresorption bisphosphonate drugs that have a pyrrolidine unit with different substituents, obtained through a simple dipolar cycloaddition reaction between