Synthesis of some 2-substituted benzimidazoles was carried out for testing anti-inflammatory

Synthesis of some 2-substituted benzimidazoles was carried out for testing anti-inflammatory activities. Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 5.08 (s 2 benzyl-CH2) 3.72 (s 3 -COOCH3) 2.32 (s 3 Ar-CH3). Methyl-N-(4-chlorobenzyl)-pyrrole-2-carboxylate (7c) Isolated as white solid yield 1.52 g (60.8%); 1H NMR (300 MHz CDCl3): δ 7.08 (d = 8.1 Hz 2 C2′ C6′ Ar-H) 7.26 (d 1 = 1.5 Hz pyrrole-C5′H) 7.2 (d 2 = 8.4 Hz C3′ C5′-Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 5.28 (s 2 benzyl-CH2) 3.67 (s 3 -COOCH3). Methyl-N-(4-nitrobenzyl)-pyrrole-2-carboxylate (7d) Isolated as white solid yield 1.68 g (64.6%); 1H NMR (300 MHz CDCl3): δ 7.98 (d = 8.1 Hz 2 C3′ C5′ Ar-H) 7.37 (d 1 = 1.5 Hz pyrrole-C5′H) 7.2 (d 2 = 8.4 Hz C2′ C6′-Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 5.58 (s 2 benzyl-CH2) 3.77 (s 3 -COOCH3). Preparation of HCl. The producing precipitate was filtered and washed with water and petroleum ether to give the desired acids 8a-d. N-benzyl-2-pyrrol carboxylic acid (8a) Isolated as white solid yield 1.92 g (95.5%); 1H NMR (300 MHz CDCl3): δ 13.66 (br s 1 -COOH) 7.7 (d = 7.6 Hz 2 C3′ C5′ Ar-H) 7.37 (d 1 = 1.5 Hz pyrrole-C5′H) 7.25 (m 3 C2′ C4′ C6′-Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 4.98 (s 2 benzyl-CH2). N-(4-methylbenzyl)-2-pyrrole carboxylic acid (8b) Isolated as white solid yield 2.07 g (96.2%); 1H NMR (300 MHz DMSO-= 1.5 Hz pyrrole-C5′H) 6.38 (d 1 = 1.5 Hz pyrrole-C3′H) 6.2 (m 1 pyrrole-C4′H) 5.58 (s 2 benzyl-CH2) Retaspimycin HCl 2.32 (s 3 Ar-CH3). N-(4-chlorobenzyl)-2-pyrrole carboxylic acid (8c) Isolated as white solid yield 2.18 g (93%); 1H NMR (300 MHz DMSO-= 8.1 Hz 2 C3′ C5′ Ar-H) 7.27 (d 1 = 1.5 Hz pyrrole-C5′H) 7.2 (d 2 = 8.4 Hz C2′ C6′-Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 6.21 (m 1 pyrrole-C4′H) 5.52 (s 2 benzyl-CH2). N-(4-nitrobenzyl)-2-pyrrole carboxylic acid (8d) Isolated as white solid yield 2.22 g (90.2%); 1H NMR (300 MHz DMSO-= 8.1 Hz 2 C3′ C5′ Ar-H) 7.37 (d 1 = 1.5 Hz pyrrole-C5′H) 7.2 (d 2 = 8.4 Hz C2′ C6′-Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 5.58 (s 2 benzyl-CH2). Preparation of = 8.7 Hz Bzi-C4 C7-H) 7.37 (d 1 = 1.5 Hz pyrrole-C5′H) 7.33 (d 2 = 8.7 Hz Bzi-C5 C6-H) 7.02 (m 5 Ar-H) 6.4 (d 1 J = 1.5 Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 5.28 (s 2 benzyl-CH2) 5.02 (br s 1 NH). Retaspimycin HCl 2 (9b) Isolated as white solid yield 1.15 g (80.14%); 1H NMR (300 MHz DMSO-= 8.7 Hz Bzi-C7H) 7.34 (d 1 = 1.5 Hz pyrrole-C5′H) 7.13 (s 1 Bzi-C4H) 7.05 (d 1 = 8.7 Hz Bzi-C6H) 6.98 (m 5 Ar-H) 6.4 Rabbit Polyclonal to SCNN1D. (d 1 = 1.5 Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 5.56 (s 2 benzyl-CH2) 5.11 (br s 1 NH) 2.3 (s 3 Bzi-CH3). 2 (9c) Isolated as pale yellow solid yield 1.06 g (67%); 1H NMR Retaspimycin HCl (300 MHz DMSO-= 8.7 Hz Bzi-C7H) 7.37 (d 1 = 1.5 Hz pyrrole-C5′H) 7.32 (s 1 Bzi-C4H) 7.23 (d 1 = 8.7 Hz Bzi-C6H) 6.98 (m 5 Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 5.39 (s 2 benzyl-CH2) 5.06 (br s 1 NH). N-benzyl-2-pyrrole-5-chlorobenzimidazole (9d) Isolated as yellow solid yield 1.21 g (79%); 1H NMR (300 MHz DMSO-= 8.7 Hz Bzi-C7H) 7.37 (d 1 = 1.5 Hz pyrrole-C5′ H) 7.33 (s 1 Bzi-C4H) 7.23 (d 1 = 8.7Hz Bzi-C6H) 7.02 (m 5 Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 6.23 (m Retaspimycin HCl 1 pyrrole-C4′H) 5.44 (s 2 benzyl-CH2) 5.11 (br s 1 NH). 2 (9e) Isolated as white solid yield 1.07 g (74%); 1H NMR (300 MHz DMSO-= 8.7 Hz Bzi-C4 C7-H) 7.37 (d 1 = 1.5 Hz pyrrole-C5′H) 7.33 (d 2 = 8.7 Hz Bzi-C5 C6-H) 7.22 (d 2 = 8.4 Hz C3′ C5′-Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 5.43 (s 2 benzyl-CH2) 5 (br s 1 NH) 2.32 (s 3 Ar-CH3). N-(4-methylbenzyl)-2-pyrrolyl-5-nitrobenzimidazole (9f) Isolated as white solid yield 1.24 g (74.7%); 1H NMR (300 MHz DMSO-7.6 Hz 2 C2′ C6′ Ar-H) 7.61 (d 1 = 8.7 Hz Bzi-C7H) 7.37 (d 1 = 1.5 Hz pyrrole-C5′H) 6.23 (m 1 pyrrole-C4′H) 7.33 (s 1 Retaspimycin HCl Bzi-C4H) 7.23 (d 1 = 8.7 Hz Bzi-C6H) 7.22 (d 2 = 8.4 Hz C3′ C5′-Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 5.48 (s 2 benzyl-CH2) 5.04 (br s 1 NH) 2.42 (s 3 Ar-CH3). N-(4-chlorobenzyl)-2-pyrrolylbenzimidazole (9g) Isolated as white solid yield 1.21 g (78.8%). 1H NMR (300 MHz DMSO-7.6 Hz 2 C2′ C6′ Ar-H) 7.58 (d 2 = 8.7 Hz Bzi-C4 C7-H) 7.37 (d 1 = 1.5 Hz pyrrole-C5′H) 7.33 (d 2 = 8.7 Hz Bzi-C5 C6-H) 7.22 (d 2 = 8.4 Retaspimycin HCl Hz C3′ C5′-Ar-H) 6.4 (d 1 = 1.5 Hz pyrrole-C3′H) 6.23 (m 1 pyrrole-C4′H) 5.52 (s 2 benzyl-CH2) 5 (br s 1 NH). N-(4-chlorobenzyl)-2-pyrrolyl-5-nitrobenzimidazole (9h) Isolated as white solid yield 1.09 g (61.9%); 1H NMR (300 MHz DMSO-7.6 Hz C2′ C6′.

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