pyrazole derivative 6b (CBS0550) had high affinity for the CB(2) receptor (IC(50)=2.9 nM, EC(50)=1.8 nM, E(max)=85%), high selectivity for CB(2) (CB(1) IC(50)/CB(2) IC(50)=1400), and good physicochemicalproperties (solubility in water: 5.9 mg/100mL at 25 degrees C). Oral administration of 6b to rats at a dose of 10mg/kg resulted in significant plasma concentrations, and orally administered compound 6b significantly
Practical cleavage of trifluoroacetamides with p-toluensulfonic acid
作者:Cierra Spencer、Jaume Balsells、Hongmei Li
DOI:10.1016/j.tetlet.2008.12.050
日期:2009.3
A practical and efficient cleavage of trifluoroacetamides with p-TsOH·H2O has been developed. The deprotected amines are isolated directly from the reaction mixture as tosylate salts. This method can be applied to both secondary and tertiary trifluoroacetamides in good isolated yields.