2021
DOI: 10.1002/cbdv.202000832
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Synthesis and Biological Evaluation of 1,3,5‐Trisubstituted 2‐Pyrazolines as Novel Cyclooxygenase‐2 Inhibitors with Antiproliferative Activity

Abstract: A new series of 1,3,5‐trisubstituted 2‐pyrazolines for the inhibition of cyclooxygenase‐2 (COX‐2) were synthesized. The designed structures include a COX‐2 pharmacophore SO2CH3 at the para‐position of the phenyl ring located at C‐5 of a pyrazoline scaffold. The synthesized compounds were tested for in vitro COX‐1/COX‐2 inhibition and cell toxicity against human colorectal adenocarcinoma cell lines HT‐29. The lead compound (4‐chlorophenyl){5‐[4‐(methanesulfonyl)phenyl]‐3‐phenyl‐4,5‐dihydro‐1H‐pyrazol‐1‐yl}metha… Show more

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Cited by 5 publications
(5 citation statements)
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References 37 publications
(43 reference statements)
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“…The anti-inflammatory, analgesic, antipyretic, and anticoagulant effects of NSAIDs result from blocking the COX-2 enzyme. On the other hand, the inhibition of physiological prostaglandin production by COX-1 blockade is the cause of most of the side effects of NSAIDs [ 75 , 76 ]. In addition, selective COX-2 inhibitors present chemopreventive activity in colorectal cancer [ 77 ].…”
Section: Discussionmentioning
confidence: 99%
“…The anti-inflammatory, analgesic, antipyretic, and anticoagulant effects of NSAIDs result from blocking the COX-2 enzyme. On the other hand, the inhibition of physiological prostaglandin production by COX-1 blockade is the cause of most of the side effects of NSAIDs [ 75 , 76 ]. In addition, selective COX-2 inhibitors present chemopreventive activity in colorectal cancer [ 77 ].…”
Section: Discussionmentioning
confidence: 99%
“…[49] In another study by our group, various 1,3,5-trisubstituted 2-pyrazolines were prepared without catalyst in the cyclization step. [50] The prepared chalconic compound…”
Section: Reactions Without Using Catalystmentioning
confidence: 99%
“…In another study by our group, various 1,3,5‐trisubstituted 2‐pyrazolines were prepared without catalyst in the cyclization step [50] . The prepared chalconic compound 35 a was reacted with hydrazine hydrate 35 b in ethanol under reflux conditions to obtain N1‐unsubstituted 2‐pyrazoline 35 c , which was treated with various acyl chlorides 35 d or isocyanates 35 e and 35 f to yield 2‐pyrazolines 35 g , 35 h , 35 i (Scheme 35).…”
Section: Synthetic Strategiesmentioning
confidence: 99%
“…Several nonsteroidal anti-inflammatory drugs (NSAIDs) exert their effect by inhibiting cyclooxygenases (COXs) which catalyzes the of arachidonic acid (AA) metabolism in prostaglandins (PGs) and thromboxanes (TXs) [6,7]. COX was shown to exhibit three isoforms, those being COX-1, COX-2 and COX-3 [8]. The constitutive enzyme COX-1 is involved in the production of physiological PGs and TXs which control, respectively, the protection of the gastric mucosa, kidney function and platelet aggregation, acting as a "housekeeper" enzyme [7,9,10].…”
Section: Introductionmentioning
confidence: 99%