The influence of ionic liquids on the Knoevenagel condensation of 1H-pyrrole-2-carbaldehyde with phenyl acetonitriles – cytotoxic 3-substituted-(1H-pyrrol-2-yl)acrylonitriles
Discovery of (Z)-2-phenyl-3-(1H-pyrrol-2-yl)acrylonitrile derivatives active against Haemonchus contortus and Ctenocephalides felis (cat flea)
作者:Abdelselam Ali、Marianne Bliese、Jo-Anne M. Rasmussen、Roger M. Sargent、Simon Saubern、David G. Sawutz、John S. Wilkie、David A. Winkler、Kevin N. Winzenberg、Ruth C.J. Woodgate
DOI:10.1016/j.bmcl.2006.11.043
日期:2007.2
A series of 2-phenyl-3-(1H-pyrrol-2-yl)acrylonitrile derivatives were synthesized and evaluated for in vitro activity against the endoparasite Haemonchus contortus and the ectoparasite Ctenocephalidesfells. Some compounds had significant in vitro activity against these parasites. (c) 2006 Elsevier Ltd. All rights reserved.
The influence of ionic liquids on the Knoevenagel condensation of 1H-pyrrole-2-carbaldehyde with phenyl acetonitriles – cytotoxic 3-substituted-(1H-pyrrol-2-yl)acrylonitriles
作者:Ahmed Al Otaibi、Christopher P. Gordon、Jayne Gilbert、Jennette A. Sakoff、Adam McCluskey
DOI:10.1039/c3ra47418f
日期:——
The Knoevenagel condensation of a series of substituted phenyl acetonitriles with 1H-pyrrole-2-carbaldehyde was examined in seven 1-butyl-3-methylimidazolium based ionic liquids and three protic ionic liquids. Of these [BMIM][Br] and [BMIM][OH], with catalytic piperidine, proved most efficient affording 3-substituted-(1H-pyrrol-2-yl)acrylonitriles 3â17 in good to excellent yields (98%) whilst utilisation of the protic ionic liquid propyl ammonium nitrate resulted in reduced yields (0â66%). Screening of the 3-substituted-(1H-pyrrol-2-yl)acrylonitriles analogues 3â17 against a panel of 11 cancer cell lines and one normal cell line allowed the identification of a series of compounds with broad spectrum cytotoxicity, but more interestingly a significant degree of MCF-7 breast cancer cell line specificity was evident with 6 (7 to >25 fold) and 13 (5.7 to >80 fold). Other analogues show high level of efficacy against specific cell lines with 10 showing excellent activity against MCF-7 (GI50 = 1.7 μM) and A431 (GI50 = 2.8 μM) cell lines. The most promising of the compounds identified herein were the 4-CF3 substituted 10 and the 3,4-dichloro substituted 13 with excellent activities against MCF-7 and A431 cell lines. The 3,4-dichloro-13 was a 0.56 μM potent inhibitor of MCF-7 cell growth.