Optimization of 3-(phenylthio)quinolinium compounds against opportunistic fungal pathogens
摘要:
Ring-opened benzothieno[3,2-b]quinolinium salts (3) were designed and synthesized with substitution on the thiophene moiety. In vitro screenings were carried out against fungal pathogens including Cryptococcus neoformans, Candida albicans, Candida glabrata, Candida krusei and Aspergillus fumigatus. In all, by replacing the N-methyl group (2) with N-omega-phenylpentyl or omega-cyclohexylpentyl group to form substituted 3-(phenylthio)quinolinium compounds produced remarkable potencies, as high as 300-fold (cf. cryptolepine (1) = 250 mu g/mL vs lip = 0.8 mu g/mL for C. albicans) over the starting tetracyclic parent. In addition, all the N-omega-cyclohexylpentyl analogs produced superior activity against all the microorganisms tested than the N-omega-phenylpentyl substituted compounds. The potential of these compounds to induce toxicity in Vero cells was also investigated and the majority of them showed lower or no cytotoxicity at 10 mu g/mL than amphotericin B. the gold standard in antifungal drug development. For instance, the trifluoromethyl substituted analogs (11n-p) have selectivity indices over 2-fold better than those of amphotericin B in C. neoformans. Overall, this ring-opened scafford of benzothienoquinolines, with substitution on the thiophenyl moiety, serves as a new lead for further development. Published by Elsevier Masson SAS.
Optimization of 3-(phenylthio)quinolinium compounds against opportunistic fungal pathogens
摘要:
Ring-opened benzothieno[3,2-b]quinolinium salts (3) were designed and synthesized with substitution on the thiophene moiety. In vitro screenings were carried out against fungal pathogens including Cryptococcus neoformans, Candida albicans, Candida glabrata, Candida krusei and Aspergillus fumigatus. In all, by replacing the N-methyl group (2) with N-omega-phenylpentyl or omega-cyclohexylpentyl group to form substituted 3-(phenylthio)quinolinium compounds produced remarkable potencies, as high as 300-fold (cf. cryptolepine (1) = 250 mu g/mL vs lip = 0.8 mu g/mL for C. albicans) over the starting tetracyclic parent. In addition, all the N-omega-cyclohexylpentyl analogs produced superior activity against all the microorganisms tested than the N-omega-phenylpentyl substituted compounds. The potential of these compounds to induce toxicity in Vero cells was also investigated and the majority of them showed lower or no cytotoxicity at 10 mu g/mL than amphotericin B. the gold standard in antifungal drug development. For instance, the trifluoromethyl substituted analogs (11n-p) have selectivity indices over 2-fold better than those of amphotericin B in C. neoformans. Overall, this ring-opened scafford of benzothienoquinolines, with substitution on the thiophenyl moiety, serves as a new lead for further development. Published by Elsevier Masson SAS.
Trisubstitutedsilylphenoxyheterocycles and analogues
申请人:Bayer CropScience Aktiengesellschaft
公开号:US10683311B2
公开(公告)日:2020-06-16
The present disclosure relates to fungicidal active compounds, more specifically to trisubstitutedsilylphenoxyhetero-cycles and analogues thereof, processes and, intermediates for their preparation and use thereof as fungicidal active compound, particularly in the form of fungicide compositions. The present disclosure also relates to methods for the control of phytopathogenic fungi of plants using these compounds or compositions comprising thereof.
TRISUBSTITUTEDSILYLPHENOXYHETEROCYCLES AND ANALOGUES
申请人:Bayer CropScience Aktiengesellschaft
公开号:EP3368514A1
公开(公告)日:2018-09-05
TRISUBSTITUTED SILYLPHENOXYHETEROCYCLES AND ANALOGUES
申请人:Bayer CropScience Aktiengesellschaft
公开号:EP3368514B1
公开(公告)日:2021-08-18
[EN] TRISUBSTITUTEDSILYLPHENOXYHETEROCYCLES AND ANALOGUES<br/>[FR] HÉTÉROCYCLES SILYLPHÉNOXY TRISUBSTITUÉS ET ANALOGUES
申请人:BAYER CROPSCIENCE AG
公开号:WO2017072283A1
公开(公告)日:2017-05-04
The present disclosure relates to fungicidal active compounds, more specifically to trisubstitutedsilylphenoxyheterocycles and analogues thereof, processes and, intermediates for their preparation and use thereof as fungicidal active compound, particularly in the form of fungicide compositions. The present disclosure also relates to methods for the control of phytopathogenic fungi of plants using these compounds or compositions comprising thereof.