Two energy transfer cassettes that exhibit a large pseudo Stokes' shift (up to 400 nm) due to efficient through-bond energy transfer (up to 99%) have been constructed. Selective binding of Fe(III) with the donor entity significantly suppresses the excitation energy transfer resulting in fluorescence quenching in aqueous solution and in living cells.
K2S2O8-Promoted Aryl Thioamides Synthesis from Aryl Aldehydes Using Thiourea as the Sulfur Source
作者:Yongjun Bian、Xingyu Qu、Yongqiang Chen、Jun Li、Leng Liu
DOI:10.3390/molecules23092225
日期:——
Thiourea as a sulfur atom transfer reagent was applied for the synthesis of aryl thioamides through a three-component coupling reaction with aryl aldehydes and N,N-dimethylformamide (DMF) or N,N-dimethylacetamide (DMAC). The reaction could tolerate various functional groups and gave moderate to good yields of desired products under the transition-metal-free condition.
A novel class of phosphodiesterase 10A (PDE10A) inhibitors with improved metabolic stability in mouse liver microsomes were designed and synthesized starting from 2-(4-[1-methyl-4-(pyridin-4-yl)-1H-pyrazol-3-yl]phenoxy}methyl)quinoline (MP-10). Replacement of the phenoxymethyl part of MP-10 with an oxymethyl phenyl unit led to the identification of 2-[4-([1-methyl-4-(pyridin-4-yl)-1H-pyrazol-3-yl]oxy}methyl)phenyl]quinoline (14), which showed moderate PDE10A inhibitory activity with improved metabolic stability in mouse and human liver microsomes over MP-10. Compound 14 showed high concentrations in plasma and brain after intraperitoneal administration and dose-dependently attenuated the hyperlocomotion induced by phencyclidine in mice, and oral administration of 14 (0.1, 0.3 mg/kg) also improved visual-recognition memory impairment in mice.