Synthesis and 5-HT-3 receptor binding activity of 5-[125I]iodo-2,3-dimethoxy-N-(1-azabicyclo[2.2.2]oct-3-yl)benzamide and its 5-halogen-2-alkoxyl homologues
摘要:
(S)-5-Iodo-2,3-dimethoxy-N-(1-azabicyclo[2.2.2]oct-3-yl)benzamide (MIZAC) was prepared from 5-iodo-2,3-dimethoxybenzoyl chloride and (S)-3-aminoquinuclidine. [I-125]Iodode-stannylation of its corresponding 5-tri-n-butyltin derivative gave [I-125]-MIZAC at 1800 Ci/mmol. Binding of [I-125]-MIZAC in rat entorhinal cortex revealed a K-D of 1.37 +/- 0.21 nM. A series of racemic 2-O-alkyl derivatives of MIZAC were prepared and 5-HT-3 receptor affinities were determined by inhibition of [I-125]-MIZAC binding. Optimal affinity for the receptor was obtained with small, electron-withdrawing substituents in the aromatic 5-position and with bulky substituents in the 3-position. [I-125]-MIZAC is a selective radioligand useful for in vitro identification of the 5-HT-3 receptor.
Synthesis and 5-HT-3 receptor binding activity of 5-[125I]iodo-2,3-dimethoxy-N-(1-azabicyclo[2.2.2]oct-3-yl)benzamide and its 5-halogen-2-alkoxyl homologues
摘要:
(S)-5-Iodo-2,3-dimethoxy-N-(1-azabicyclo[2.2.2]oct-3-yl)benzamide (MIZAC) was prepared from 5-iodo-2,3-dimethoxybenzoyl chloride and (S)-3-aminoquinuclidine. [I-125]Iodode-stannylation of its corresponding 5-tri-n-butyltin derivative gave [I-125]-MIZAC at 1800 Ci/mmol. Binding of [I-125]-MIZAC in rat entorhinal cortex revealed a K-D of 1.37 +/- 0.21 nM. A series of racemic 2-O-alkyl derivatives of MIZAC were prepared and 5-HT-3 receptor affinities were determined by inhibition of [I-125]-MIZAC binding. Optimal affinity for the receptor was obtained with small, electron-withdrawing substituents in the aromatic 5-position and with bulky substituents in the 3-position. [I-125]-MIZAC is a selective radioligand useful for in vitro identification of the 5-HT-3 receptor.
Iron-catalyzed oxidative C–C(vinyl) σ-bond cleavage of allylarenes to aryl aldehydes at room temperature with ambient air
作者:Binbin Liu、Lu Cheng、Penghui Hu、Fangning Xu、Dan Li、Wei-Jin Gu、Wei Han
DOI:10.1039/c9cc01995b
日期:——
heteroatoms to give aryl aldehydes is reported. The unstrained carbon–carbon single bond cleavage reaction uses ambient air as the sole oxidant, proceeds efficiently at roomtemperature, and allows for exceptional functional-group tolerance, which addresses the long-standing challenges of current C–C bond cleavage/functionalization. Notably, the method enables rapid late-stage oxidation of complex bioactive
The present invention provides novel enterobactin-cargo conjugates, such as compounds of Formula (I), and salts thereof, where X is the cargo and may be an antibiotic, a fluorophore, or biotin. The present invention also provides complexes, compositions, kits, and methods that involve the compounds of Formula (I) and are useful in delivering a cargo to a bacterium, treating a bacterial infection, cystic fibrosis, and/or inflammatory bowel disease in a subject, preventing a bacterial infection, cystic fibrosis, and/or inflammatory bowel disease in a subject, inhibiting the growth of or killing a bacterium, or determining the concentration of a bacterium in a biological sample. In certain embodiments, the bacterium is a Gram-negative bacterium.