作者:Shahnaz Perveen、Sana Mustafa、Mehreen Latif、Lubna Iqbal、Tanzil H. Usmani、Khalid Mohammed Khan、Wolfgang Voelter
DOI:10.1007/s00044-014-0930-3
日期:2014.7
The objective of this study was to synthesize potent and/or novel inhibitors for alpha-chymotrypsin activity. Eighteen derivatives of N-methylphenyl-N'-(alkyl/aryl) urea (1-18) were synthesized, and their inhibitory effects on alpha-chymotrypsin enzyme were evaluated. Two compounds exhibited potent inhibitory activities. The most potent, N-(2-methylphenyl)-2-oxo-1-pyrrolidinecarboxamide (15) having a methyl group at ortho position was the most active inhibitor with an IC50 value of 8.10 +/- A 0.14 mu M, which was comparable to standard chymostatin (IC50 = 8.24 +/- A 0.11 mu M). A slightly less potent, N-(2-acetylphenyl)-N'-(3-methylphenyl) urea (10), exhibited an IC50 of 13.6 +/- A 0.23 mu M. Compounds 3, 4, 7, 11, and 13 exhibited moderate activities. The results demonstrated that alpha-chymotrypsin inhibition is related to the position of the methyl group and the presence of substituent at the nitrogen of the urea bridge. The inhibitory trend suggests that alpha-chymotrypsin inhibitory activity declines with ortho > meta > para substitution order. In conclusion, our data suggest that the compound 15 may serve as a lead compound for further designing of other potent or novel alpha-chymotrypsin inhibitors.