A series of novel 3-substituted quinoxalin-2-carboxamides were designed as per the pharmacophoric requirement for 5-HT(3) receptorantagonists and prepared by microwave irradiation and also by conventional method. The compounds were characterized by spectral data (IR, (1)H NMR, and MS) and the purity was ascertained by microanalysis. The synthesized compounds were evaluated for 5-HT(3) antagonisms
Pharmacophore Based Synthesis of 3-Chloroquinoxaline-2-carboxamides as Serotonin3 (5-HT3) Receptor Antagonist
作者:Radhakrishnan Mahesh、Ramachandran Venkatesha Perumal、Pandi Vijaya Pandi
DOI:10.1248/bpb.27.1403
日期:——
A series of 3-chloroquinoxaline-2-carboxamides were designed and prepared by the condensation of 3-chloro-2-quinoxaloylchloride with appropriate Mannich bases of the p-aminophenol in the microwave environment. The synthesized compounds were evaluated for serotonin3 (5-HT3) receptor antagonistic activities in longitudinal muscle-myenteric plexus (LMMP) preparation from guinea pig ileum against the 5-HT3 agonist, 2-methyl-5-HT. Compound 3g exhibited comparable 5-HT3 antagonistic activity (pA2 6.4) to that of standard antagonist Ondansetron (pA2 6.9), while the other compounds exhibited mild to moderate 5-HT3 antagonistic activities.
Synthesis and Biological Evaluation of Some Potential Antimalarials. Synthese und biologische Bewertung einiger potentieller Wirkstoffe gegen Malaria
作者:Chang Swei Tsai、Ai Yu Shen
DOI:10.1002/ardp.19943271015
日期:——
Malaria chemotherapy has been well reviewed. Malarial parasites gaining resistance is the major problem in the treatment of the disease. Some strains are resistant not only to chloroquine but also to amodiaquine. Few new drugs are available or foreseen for the near future. The principal metabolite of cinchona alkaloids appears to be oxidized at C‐2. This may result in a loss of activity. Pinder and
Venugopalan, B.; Souza, E. Pinto de; Sathe, K. M., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1995, vol. 34, # 9, p. 778 - 790
作者:Venugopalan, B.、Souza, E. Pinto de、Sathe, K. M.、Chatterjee, D. K.、Iyer, N.
DOI:——
日期:——
Synthesis and antifilarial activity of N-[4-[[4-alkoxy-3-[(dialkylamino)methyl]phenyl]amino]-2-pyrimidinyl]-N'-phenylguanidines
作者:Mario Angelo、Daniel Ortwine、Donald Worth、Leslie M. Werbel、John W. McCall
DOI:10.1021/jm00363a010
日期:1983.9
A series of N-[4-[[4-alkoxy-3-[(dialkylamino)methyl]phenyl]amino]- 2-pyrimidinyl]-N'-phenylguanidines have been synthesized for antifilarial evaluation. Reaction of the appropriate benzenamines with N-cyanoguanidine, followed by condensation of the resultant N-phenylimidodicarbonimidic diamides (V) with ethyl 4,4,4-trifluoro-3-oxobutanoate provided the intermediate N-(4-hydroxy-2-pyrimidinyl)-N'-phenylguanidines VIa. Alternatively, compounds VIa were synthesized by reaction of the requisite beta-keto esters (VII) with N-cyanoguanidine to give the (4-hydroxy-2-pyrimidinyl)cyanamides (VIII), followed by treatment with the desired benzenamines. Chlorination with POCl3 and condensation with the appropriate benzenamines (IX) generated the desired guanidines (X). Antifilarial activity was confined to adult Litomosoides carinii infections, and a structure-activity relationship for this activity is discussed. Lack of activity against L. carinii microfilaria and adult Brugia pahangi infections preclude further work in this area pending evaluation in additional experimental models.