Microwave assisted efficient Hantzsch reaction via four-component coupling reactions of tetrazolo[1,5-α]quinoline-4-carbal-dehyde, dimedone/cyclohexane-1,3-dione,ethyl/methyl acetoacetate and ammonium acetate was des...Microwave assisted efficient Hantzsch reaction via four-component coupling reactions of tetrazolo[1,5-α]quinoline-4-carbal-dehyde, dimedone/cyclohexane-1,3-dione,ethyl/methyl acetoacetate and ammonium acetate was described as the preparation of tetrazolo[1,5-α]quinoline based 1,4-dihydropyridines,acridine-1,8-diones and polyhydroquinolines.The process presented here is simple,rapid,environmentally welcoming and high yielding.All the derivatives were subjected to an in vitro antimicrobial screening against a representative panel of bacteria and fungi and results worth further investigations.展开更多
Methylene blue sensitized singlet oxygen oxidation of dl-α-tocopherol in dodecylsulfate (SDS) or cetyl trimethyl ammonium brondde (CTAB) ndcelles led to the formation, besidesα-tocopherol quinone and its epoxide, of...Methylene blue sensitized singlet oxygen oxidation of dl-α-tocopherol in dodecylsulfate (SDS) or cetyl trimethyl ammonium brondde (CTAB) ndcelles led to the formation, besidesα-tocopherol quinone and its epoxide, of a hitherto unknown spiro compound 6-hydroxy-2,6,8,9-tetramethyl-2-phytyl- 1-oxaspiro [4, 5] dec -8 - en - 7, 10-dione.展开更多
A new sequiterpenoid compound 8aa-hydroxy-l-isopropyl-4,7-dimethyl-l,2,3,4,6,8a-hexahydro-naphthalene-2,6- dione （1）, together with seven known compounds anti-HH-dimer-coumarin （2）, （-）-5-exo-hydroxy-borneol （3...A new sequiterpenoid compound 8aa-hydroxy-l-isopropyl-4,7-dimethyl-l,2,3,4,6,8a-hexahydro-naphthalene-2,6- dione （1）, together with seven known compounds anti-HH-dimer-coumarin （2）, （-）-5-exo-hydroxy-borneol （3）, O-hydroxyl cinnamic acid （4）, 9β-hydroxy-ageraphorone （5）, 10Hα-9-oxo-ageraphorone （6）, 10Hβ-9-oxo- ageraphorone （7） and 9-oxo-10,11-dehydroageraphorone 8, was isolated from the leaves of Eupatorium adenopho- rum Spreng. The structures were elucidated by IR, ^1H and ^13C NMR, EIMS, HMBC and single-crystal X-ray spectral data.展开更多
文摘Microwave assisted efficient Hantzsch reaction via four-component coupling reactions of tetrazolo[1,5-α]quinoline-4-carbal-dehyde, dimedone/cyclohexane-1,3-dione,ethyl/methyl acetoacetate and ammonium acetate was described as the preparation of tetrazolo[1,5-α]quinoline based 1,4-dihydropyridines,acridine-1,8-diones and polyhydroquinolines.The process presented here is simple,rapid,environmentally welcoming and high yielding.All the derivatives were subjected to an in vitro antimicrobial screening against a representative panel of bacteria and fungi and results worth further investigations.
文摘Methylene blue sensitized singlet oxygen oxidation of dl-α-tocopherol in dodecylsulfate (SDS) or cetyl trimethyl ammonium brondde (CTAB) ndcelles led to the formation, besidesα-tocopherol quinone and its epoxide, of a hitherto unknown spiro compound 6-hydroxy-2,6,8,9-tetramethyl-2-phytyl- 1-oxaspiro [4, 5] dec -8 - en - 7, 10-dione.
基金Project supported by National Natural Science Foundation of China （No. 20372010）, Trans-Century Training Program Foundation for the Talents, Ministry of Education of China and Important technical research in agricultural structure regulation of agricultural department （No. 2003-11-04A）.
文摘A new sequiterpenoid compound 8aa-hydroxy-l-isopropyl-4,7-dimethyl-l,2,3,4,6,8a-hexahydro-naphthalene-2,6- dione （1）, together with seven known compounds anti-HH-dimer-coumarin （2）, （-）-5-exo-hydroxy-borneol （3）, O-hydroxyl cinnamic acid （4）, 9β-hydroxy-ageraphorone （5）, 10Hα-9-oxo-ageraphorone （6）, 10Hβ-9-oxo- ageraphorone （7） and 9-oxo-10,11-dehydroageraphorone 8, was isolated from the leaves of Eupatorium adenopho- rum Spreng. The structures were elucidated by IR, ^1H and ^13C NMR, EIMS, HMBC and single-crystal X-ray spectral data.
