Cytotoxicity of Substituted Alkyl-3,4-bis(4-methoxyphenyl)pyrrole-2-carboxylates in L1210 Lymphoid Leukemia Cells
摘要:
Two alkyl-3,4-bis(4-methoxyphenyl)pyrrole-2-carboxylates proved to be potent cytotoxic agents in the murine L1210 lymphoid leukemia screen. DNA synthesis was preferentially inhibited with the major target of the agents being de novo purine biosynthesis at the regulatory enzyme sites of PRPP-amido transferase and IMP dehydrogenase. Other enzymatic activities which were suppressed by the drugs were DNA polymerase alpha, RNA polymerases, ribonucleoside reductase and dihydrofolate reductase. The d[NTP] pools, nucleoside kinase and the pyrimidine pathway were not affected by the presence of drugs. The DNA molecule itself was not the target of the agents, i.e. no alkylation of nucleotide bases, intercalation between bases or cross-linking of DNA strands occurred. The agents did cause L1210 DNA fragmentation after 24 h incubation at 100 microM.
Expedient synthesis of highly substituted 3,4-dihydro-1,2-oxathiine 2,2-dioxides and 1,2-oxathiine 2,2-dioxides: revisiting sulfene additions to enaminoketones
作者:Stuart Aiken、Kelechi Anozie、Orlando D. C. C. de Azevedo、Lewis Cowen、Ross J. L. Edgar、Christopher D. Gabbutt、B. Mark Heron、Philippa A. Lawrence、Abby J. Mills、Craig R. Rice、Mike W. J. Urquhart、Dimitrios Zonidis
DOI:10.1039/c9ob01657k
日期:——
Diversely substituted 1,2-oxathiine 2,2-dioxides, including 3,5,6-triaryl-, 3,6-diaryl-, 3,5-diaryl-, 5,6-diaryl- and selected fused heterocyclic analogues, have been efficiently obtained by the application of a mild Cope elimination of a 4-amino moiety from the requisite 4-amino-3,4-dihydro-1,2-oxathiine 2,2-dioxides, which themselves were readily obtained by the addition of sulfenes to enaminoketones
Synthesis, chemical, and biological properties of vinylogous hydroxamic acids: dual inhibitors of 5-lipoxygenase and IL-1 biosynthesis
作者:Stephen W. Wright、Richard R. Harris、Janet S. Kerr、Alicia M. Green、Donald J. Pinto、Elaine M. Bruin、Robert J. Collins、Roberta L. Dorow、Lisa R. Mantegna
DOI:10.1021/jm00100a011
日期:1992.10
of each being dependent upon the structure of the VHA, solvent, and pH. VHAs undergo some of the typical reactions of hydroxamic acids as well as those of vinylogous amides. VHAs are active as inhibitors of 5-lipoxygenase and of IL-1 biosynthesis in vitro, which do not inhibit other enzymes of the arachidonic acid cascade. They have been shown by ESR studies to bring about inhibition of soybean type
Pyridine derivatives useful as cyclooxygenase inhibitor
申请人:——
公开号:US20030119877A1
公开(公告)日:2003-06-26
A compound of the formula (I), wherein R
1
is hydrogen, halogen, carbymoyl, cyano, formuly, or lower alkyl optionally substituted with halogen, amino or a protected amino, R
2
is hydrogen, halogen, cyano or lower alkoxy, R
3
is phenyl or pyridyl, each of which is substituted with lower alkoxy, and R
4
is lower alkoxy; provided that either R
1
or R
2
is hydrogen, then the other is other than hydrogen, or its salts, which are useful as a medicament.
Novel 2, 4, 5-triaryl pyrimidine derivatives are useful for treating pain, fever, thrombosis, inflammation, and arthritis, and have a low potential for phototoxic side effects.