- Pyrazolo [1, 5 - a] pyrimidine nitrogen mustard derivative and its preparation method and tumor therapeutic use
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The invention relates to pyrazolo[1,5-alpha] pyrimidine nitrogen mustard derivatives or medical salts thereof, as well as application of the pyrazolo[1,5-alpha] pyrimidine nitrogen mustard derivatives or the medical salts thereof. The pyrazolo[1,5-alpha] pyrimidine nitrogen mustard derivatives and the medical salts thereof have the structure shown as the formula I. Pharmacological experiments show that the pyrazolo[1,5-alpha] pyrimidine nitrogen mustard derivatives and the medical salts thereof have inhibiting effects on the proliferation of various tumor cells. Moreover, the pyrazolo[1,5-alpha] pyrimidine nitrogen mustard derivatives are small in toxicity, have the advantages of selectivity on tumor cells, and are dual-functional anti-tumor drugs. Meanwhile, the pyrazolo[1,5-alpha] pyrimidine nitrogen mustard derivatives are easy to synthesize, and the overall yields are high. All the advantages show that the pyrazolo[1,5-alpha] pyrimidine nitrogen mustard derivatives have great potential of being anti-tumor drugs.
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- HETEROCYCLIC CGRP RECEPTOR ANTAGONISTS
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The present invention is directed to heterocyclic compounds which are antagonists of CGRP receptors and may be useful in the treatment or prevention of diseases in which CGRP is involved, such as migraine. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which CGRP is involved.
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Page/Page column 62
(2016/05/19)
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- Synthesis and structure-analgesic activity relationships of a novel series of monospirocyclopiperazinium salts (MSPZ)
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A series of monospirocyclopiperazinium salts were designed and synthesized to search for a peripherally-acting analgesic drug with low side effects. Extensive SAR studies revealed that a suitable NR2R3 was critical for the analgesic activity, which might be beneficial to expose the cationic nitrogen to bind to the receptor, and possibly interact with the receptor via π-π interaction. Introduction of substituting group on the N4-phenyl ring could improve the activity, and the best position was the 4-position. Compound 14n showed more potent analgesic activity (63%, 20 μM/kg, sc) and holds promise for development as a mechanically new analgesic drug.
- Lin, Song-Wen,Sun, Qi,Ge, Ze-Mei,Wang, Xin,Ye, Jia,Li, Run-Tao
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p. 940 - 943
(2011/03/21)
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- Synthesis and antiproliferative activity of some new DNA-targeted alkylating pyrroloquinolines
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Two novel DNA-direct alkylating agents, consisting of aniline mustard linked to an angular 3H-pyrrolo[3,2-f]quinoline nucleus, were synthetized and assayed for their in vitro antiproliferative activity. Simple convergent synthesis, consisting of separate preparation of 9-chloro-3H-pyrrolo[3,2-f] quinoline and p-amino-aniline derivatives, and following their linkage by substitution reactions 8a, b and 10, yielded the corresponding diol derivatives 7b and 9. Biological properties were evaluated with respect to cell growth inhibition, ability to form cross-links with DNA, and capacity to give rise to a molecular complex with the macromolecule for 7b, 8b, 9 and 10.
- Ferlin,Via, L. Dalla,Gia
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p. 771 - 777
(2007/10/03)
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- Self-immolative nitrogen mustard prodrugs for suicide gene therapy
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Four new potential self-immolative prodrugs derived from phenol and aniline nitrogen mustards, four model compounds derived from their corresponding fluoroethyl analogues and two new self-immolative linkers were designed and synthesized for use in the suicide gene therapy termed GDEPT (gene-directed enzyme prodrug therapy). The self-immolative prodrugs were designed to be activated by the enzyme carboxypeptidase G2 (CPG2) releasing an active drug by a 1,6-elimination mechanism via an unstable intermediate. Thus, N-[(4-{[4-(bis{2- chloroethyl}amino)phenoxycarbonyloxy]methyl}phenyl)carbamoyl]-L-glutamic acid (23), N-[(4-{[4(bis{2- chloroethyl}amino)phenoxycarbonyloxy]methyl}phenoxy)carbonyl]-L-glutamic acid (30), N-[(4-{N-(4-(bis[2- chloroethyl]amino}}pheny)carbamoyloxy]methyl}phenoxy)carbonyl]-L-glutmic acid (37), and N-[(4-{[N-(4-{bis[2- chloroethyl]amino}phenyl)carbamoyloxy]methyl}phenyl)carbamoyl]-L-glutamic acid (40) were synthesized. They are bifunctional alkylating agents in which the activating effects of the phenolic hydroxyl or amino functions are masked through an oxycarbonyl or a carbamoyl bond to a benzylic spacer which is itself]inked to a glutamic acid by an oxycarbonyl or a carbamoyl bond. The corresponding fluoroethyl compounds 25, 32, 42, and 44 were also synthesized. The rationale was to obtain model compounds with greatly reduced alkylating abilities that would be much less reactive with nucleophiles compared to the corresponding chloroethyl derivatives. This enabled studies of these model compounds as substrates for CPG2, without incurring the rapid and complicated decomposition pathways of the chloroethyl derivatives. The prodrugs were desired to be activated to their corresponding phenol and aniline nitrogen mustard drugs by CPG2 for use in GDEPT. The synthesis of the analogous novel parent drugs (21b, 51) is also described. A colorectal cell line was engineered to express CPG2 tethered to the outer cell surface. The phenylenediamine compounds were found to behave as prodrugs, yielding IC50 prodrug/IC50 drug ratios between 20- and 33-fold (for 37 and 40) and differentials of 12-14-fold between CPG2-expressing and control LacZ- expressing clones. The drugs released are up to 70-fold more potent than 4- [(2-chloroethyl)(2-mesyloxyethyl)amino]benzoic acid that results from the prodrug 4-[(2-chloroethyl)(2-mesyloxyethyl)amino]benzoyl-L-glutamic acid (CMBA) which has been used previously for GDEPT. These data demonstrate the viability of this strategy and indicate that self-immolative prodrugs can be synthesized to release potent mustard drugs selectively by cells expressing CPG2 tethered to the cell surface in GDEPT.
- Niculescu-Duvaz, Dan,Niculescu-Duvaz, Ion,Friedlos, Frank,Martin, Janet,Spooner, Robert,Davies, Lawrence,Marais, Richard,Springer, Caroline J.
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p. 5297 - 5309
(2007/10/03)
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- Hypoxia-Selective Antitumor Agents. 3. Relationships between Structure and Cytotoxicity against Cultured Tumor Cells for Substituted N,N-Bis(2-chloroethyl)anilines
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A series of aniline mustards with a wide range of electron-donating and -withdrawing substituents in the 3- and 4-positions has been synthesized and evaluated for cytotoxicity in cell culture to examine the potential of using nitro group deactivated nitrogen mustards for the design of novel hypoxia-selective anticancer drugs (Denny, W.A.; Wilson, W.R.J.Med Chem. 1986, 29, 879).Hydrolytic half-lives in tissue culture media, determined by bioassay against a cell line (UV4) defective in the repair of DNA interstrand cross-links showed the expected dependence on the Hammett electronic parameter, ?, varying from 0.13 h for the 4-amino analogue to >100 h for analogues with strongly electron-withdrawing substituents.Cytotoxic potencies in aerobic UV4 cultures showed a similar dependence on ?.This dependence predicted that the 4-nitroaniline mustard would be 7200-fold less potent than its potential six-electron reduction product, the 4-amino compound, in growth inhibition assays using a 1-h drug exposure.The measured differential was much lower (225-fold) because of the instability of the latter compound, but a differential of 17500-fold was observed in the initial rate of killing by using a clonogenic assay.The potential for formation of reactive mustards by reduction to the amine or hydroxylamine was demonstrated by the 4-nitroso compound, which had an aerobic toxicity similar to that of the amine.Although these features confirmed the original rationale, the 3-nitro- and 4-nitroaniline mustards had only minimal hypoxic selectivity against UV cells.Toxicity to hypoxic cells appears to be limited by the low reduction potentials of these compounds and consequent lack of enzymatic nitroreduction.However, this study has demonstrated that nitro groups can be used to latentiate aromatic nitrogen mustards and indicates that examples with higher reduction potentials could provide useful hypoxia-selective therapeutic agents.
- Palmer, Brian D.,Wilson, William R.,Pullen, Susan M.,Denny, William A.
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p. 112 - 121
(2007/10/02)
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