551
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Matharu SS, Rowlands DA, Taylor JB, Westwood R. Synthesis and antitussive activity of aminotetra- (and -hexa-) hydrodibenzofurans. J Med Chem 1977; 20:197-204. [PMID: 836490 DOI: 10.1021/jm00212a003] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The synthesis of a novel series of antitussive agents is described. Two series of amino-substituted tetra- and hexahydrodibenzofurans were prepared and examined for antitussive activity in the guinea pig after cough elicited by electrical stimulation of the vagus nerve. A significant level of activity, comparable with that of codeine, was found in the 4alpha-amino series. The 4-methylpiperazin-1-ylpropionamide (28) was found to be the most active of the compounds synthesized and was equipment with codeine. The effects of structural modification upon antitussive activity were investigated in numerous analogues but no enhancement of activity was achieved over that of 28.
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552
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Buser HR. Preparation of qualitative standard mixtures of polychlorinated dibenzo-rho-dioxins and dibenzofurans by ultraviolet and psi-irradiation of the octachloro compounds. J Chromatogr A 1976; 129:303-7. [PMID: 826542 DOI: 10.1016/s0021-9673(00)87788-2] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
High-resolution gas chromatography using an OV-17 glass capillary column and mass spectrometry were used to analyze uv-and psi-irradiated octachlorodibenzo-rho-dioxin and octachlorodibenzofuran. Under the conditions investigated, dechlorination of these compounds to lower chlorinated dibenzo-rho-dioxins and dibenzofurans appears to be the major reaction pathway. The resulting mixtures of penta-, hexa-and heptachloro compounds can be used as easily and safely prepared qualitative reference samples to determine gas chromatographic, mass spectrometric and other properties of individual components for which pure standards are not available.
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553
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Roveri P, Ferdenzi A, Salvadorini S. [Research on the stimulants of the central nervous system among N,N-disubstituted o-methoxybenzylamines and 3-aminocoumarans]. BOLLETTINO CHIMICO FARMACEUTICO 1976; 114:710-3. [PMID: 1267975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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554
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Hirose N, Kuriyama S, Toyoshima S. Studies on benzoheterocyclic derivatives. XVI. Synthesis and analgesic action of benzofuran derivatives. Chem Pharm Bull (Tokyo) 1976; 24:2661-7. [PMID: 1017103 DOI: 10.1248/cpb.24.2661] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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555
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Bauer VJ, Duffy BJ, Hoffman D, Klioze SS, Kosley RW, McFadden AR, Martin LL, Ong HH. Synthesis of spiro[isobenzofuran-1(3H),4'-piperidines] as potential central nervous system agents. J Med Chem 1976; 19:1315-24. [PMID: 1003409 DOI: 10.1021/jm00233a012] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Synthesis of 1'-methyl-3-phenylspiro[isobenzofuran-1(3H),4'-piperidine] (7a, HP 365) and the demethyl analogue 9a (HP 505) was prompted by recognition of an aminoalkyl(aryl)isobenzofuran moiety common to the antidepressants talopram (Lu 3-010) and trans-10,11-dihydro-5,10-epoxy-5-[3-(methylamino)propyl]-5H-dibenzo[a,d]cyclohepten-11-ol (MK-940). Convenient laboratory synthesis of 7a was provided by lithiation of 2-bromobenzhydryl methyl ether, followed by addition of 1-methyl-4-piperidone and acid-catalyzed cyclization. N-Dealkylation by standard methods afforded 9a. Synthesis of analogues was stimulated by discovery of marked inhibition of tetrabenazine-induced ptosis for lead compounds 7a and 9a. Optimal antitetrabenazine activity is associated with the 3-phenylspiro-[isobenzofuran-1(3H),4'-piperidine] moiety where nitrogen is basic. Modification of this moiety by introduction of large nitrogen substituents or a C-3 substituent greater than H significantly reduced antitetrabenazine activity. A series of analogues with aromatic substituents was investigated; however, few of these compounds were significantly more active than 7a and 9a. Compound 9a was selected for additional studies.
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556
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Ghabgharan F, Kooshkabadi H, Emami M, Rashidbaigi A, Shafiee A. Synthesis and antibacterial and antifungal activities of alkyl and polyhalophenyl esters of benzo[b]-3-methyl-2-furancarbamic acid. J Pharm Sci 1976; 65:1085-7. [PMID: 957121 DOI: 10.1002/jps.2600650737] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Several alkyl and polyhalophenyl esters of benzo[b]-3-methyl-2-furancarbamic acid were prepared and tested for antifungal activity against Candida albicans, Penicillium notatum, and Aspergillus niger. The pentachlorophenyl ester was the most active substance and the only compound to show antibacterial activity against Staphylococcus aureus.
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557
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Witiak DT, Newman HA, Poochikian GK, Loh W, Sankarappa SK. Comparative antilipidemic effects of various ethyl 5-substituted benzofuran-, 2,3-dihydrobenzofuran-, and 3(2H)-benzofuranone-2-carboxylate analogs of clofibrate in a triton hyperlipidemic rat model. Lipids 1976; 11:384-91. [PMID: 1271976 DOI: 10.1007/bf02532845] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The antilipidemic properties of certain benzofuran-, 2,3-dihydrobenzofuran-, and 3(2H)-benzofuranone-2-carboxylate analogs of clofibrate in a hyperlipidemic rat model are described. The hyperlipidemia was induced by intraperitoneal injection of Triton WR-1339. The results were analyzed in light of structural modifications as well as the lipid solubility of substituted compounds as assessed by a consideration of calculated log P values. Comparisons are made between the activity of these compounds and the activity of related cyclic analogs previously reported. Among the various compounds tested, only the 5-C1 and phenylsybstituted dihydrobenzofurans were selective against elevated serum cholesterol levels in this animal model. The data presented support the hypothesis that the cholesterol and triglyceride lowering activity of clofibrate related analogs in this animal model may be separated through a consideration of log P, conformational, and electronic changes. The proposal is advanced that relatively minor structural modification of clofibrate related analogs may lead to compounds which are not only selective in the Triton model but also to compounds which are likely to exert their effects by differing modes of action.
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558
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Hirose N, Kuriyama S, Kato Y, Toyoshima S. Antiinflammatory activity of some 2,3-dihydrobenzofuran-5-acetic acids and related compounds. J Med Chem 1976; 19:303-8. [PMID: 1249810 DOI: 10.1021/jm00224a020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A series of 2,3-dihydrobenzofuran-5-acetic acids and related compounds was prepared as potential antiinflammatory agents. As measured by the carrageenan-induced edema method for the preliminary screening test, introduction of a methyl group alpha to the acetic acid function enhanced the antiinflammatory activity, and alpha-(7-chloro-2,2-dimethyl-2,3-dihydrobenzofuran)-alpha-methyl-5-acetic acid (13a) showed the most potent activity in this series.
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559
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Abstract
Thirteen 2-methylbenzofurans were synthesized and their antibacterial activity was investigated. 2-Methyl-3-nitrobenzofuran and analogs containing 7-NO2, 5-NO2, 7-Br, 7-CONH2, and 7-CF3 substituents are bacteriostatic. The spectrum of activity of these compounds is similar to nitrofurazone; however, a strain of E. coli Br which has increased resistance to nitrofurazone did not show increased resistance to 3,7-dinitro-2-methylbenzofuran (1). The 3-nitro-2-methylbenzofurans are labile in solution (T1/2 0.8-3.5 hr at 37 degrees, pH 7.0). The solvolysis product of 1 was identified as alpha,6-dinitro-o-cresol (15). The 3-nitrobenzofurans are more potent in minimal media than in Penassay broth. This greater potency can be abolished by addition of casamino acids and tryptophan to the minimal media.
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560
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561
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Fothergill GA, Francis RJ, Hamilton TC, Osbond JM, Parkes MW. Bufuralol, a new beta-adrenoceptor blocking agent. EXPERIENTIA 1975; 31:1322-3. [PMID: 1287 DOI: 10.1007/bf01945806] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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562
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Witiak DT, Poochikian GK, Feller DR, Kenfield NA, Newman HA. 9-Chloro-2,3-dihydro-5H-1,4-dioxepino(6,5-b)benzofuran, a novel antilipidemic agent structurally related to clofibrate. J Med Chem 1975; 18:992-6. [PMID: 1159693 DOI: 10.1021/jm00244a008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The synthesis and antilipidemic activity of 9-chloro-2,3-dihydro-5H-1,4-dioxepino[6,5-b]benzofuran (3), a novel enol lactone which is considerably more resistant to serum esterase hydrolysis than clofibrate (1), are discussed. Whereas both 3 and 1 reduced hypercholesterolemic and hypertriglyceridemic serum levels in the Triton WR-1339 induced hyperlipidemic Sprague-Dawley rat to normal, the hydrolysis product of 3, namely 5-chloro-3(2'-hydroxyethoxy)-2-benzofurancarboxylic acid (4), was found to be inactive. Further, 3 is comparable to the hydrolysis product of 1 when both were assessed for their ability to block norepinephrine (NE) induced lipolysis in vitro. 4 is inactive at comparable concentrations (5 times 10(-4)-10(-3) M). The antilipidemic action of 3 and 1 may, in part, be due to their ability to block NE-induced lipolysis.
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563
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564
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Hirose N, Kuriyama S, Soda S. [Studies on benzoheterocyclic derivatives. XV. Synthesis of benzofuran derivatives (3) (author's transl)]. YAKUGAKU ZASSHI 1974; 94:905-12. [PMID: 4472613 DOI: 10.1248/yakushi1947.94.8_905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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565
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Bondesson G, Hedbom C, Högberg T, Magnusson O, Stjernström NE, Carlson LA. Potential hypolipidemic agents. 7. Synthesis and lipid-lowering properties of 2-(dibenzofuranyloxy)-2-methylpropionates and related compounds. J Med Chem 1974; 17:108-12. [PMID: 4808456 DOI: 10.1021/jm00247a019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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566
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Brown EV, Coleman RL. Carcinogenic activity of benzofuran and dibenzofuran analogs of p-dimethylaminoazobenzene. J Med Chem 1973; 16:717-8. [PMID: 4197545 DOI: 10.1021/jm00264a036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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567
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568
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Moron M, Sundström G, Wachtmeister CA. Polycholorinated biphenyls. VI. 2,3,7,8-tetrachlorodibenzofuran, a critical byproduct in the synthesis of 2,2',4,4',5,5'-hexachlorobiphenyl by the Ullmann reaction. ACTA CHEMICA SCANDINAVICA 1973; 27:3121-2. [PMID: 4204941 DOI: 10.3891/acta.chem.scand.27-3121] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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569
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Nobili G, Caputo O, Cattel L. [Synthesis of radicinine analogues. 3. Reaction of magnesium methylcarbonate on 4-hydroxy-6-methyl-2H-pyran-2-one]. IL FARMACO; EDIZIONE SCIENTIFICA 1972; 27:1113-24. [PMID: 4643818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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570
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McEvoy FJ, Church RF, Greenblatt EN, Allen GR. 1-Substituted vinyl-1-phthalanpropylamines as potential antidepressant agents. J Med Chem 1972; 15:1111-6. [PMID: 4654659 DOI: 10.1021/jm00281a006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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571
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Broekhuysen J, Pacco M, Sion R, Demeulenaere L, Van Hee M. Metabolism of benzbromarone in man. Eur J Clin Pharmacol 1972; 4:125-30. [PMID: 4655683 DOI: 10.1007/bf00562509] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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572
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Hishmat OH, Hashim AA, Shalash MR, Nawito M. Some benzofuran-carboxamide derivatives with narcotic and analgesic activity. ARZNEIMITTEL-FORSCHUNG 1972; 22:158-60. [PMID: 5066991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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573
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Crenshaw RR, Jeffries AT, Luke GM, Cheney LC, Bialy G. Potential antifertility agents. 1. Substituted diaryl derivatives of benzo[b]thiophenes, benzo[b]furans, 1H-2-benzothiapyrans, and 2H-1-benzothiapyrans. J Med Chem 1971; 14:1185-90. [PMID: 5116231 DOI: 10.1021/jm00294a011] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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574
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Hishmat OH, Hashim AA, Shalash MR, Nawito M. Synthesis of some benzofuran-carboxamide derivatives and their analgesic activity. ARZNEIMITTEL-FORSCHUNG 1971; 21:1026-8. [PMID: 5109488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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575
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Ogoh T, Hirose N, Soda S, Toyoshima S. [Studies on benzoheterocyclic derivatives. X. Synthesis and analgesic action of benzofuran derivatives]. YAKUGAKU ZASSHI 1971; 91:603-10. [PMID: 5104988 DOI: 10.1248/yakushi1947.91.6_603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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