A compound which is a benzo[a]phenazine-11-carboxamide derivative of formula (I) wherein each of R<SP>1</SP> to R<SP>4</SP>, which are the same or different, is selected from hydrogen, halogen, hydroxyl, C<SB>1</SB>-C<SB>6</SB> alkoxy which is unsubstituted or substituted,...
A series of monoreactive functional benzo[ a]phenoxazinium chlorides with a carboxyl, hydroxyl, amine or chloromethyl group were used as labels in the preparation of long-wavelength fluorescent amino acid bioconjugates. UV–visible and fluorescence studies of all compounds were carried out in ethanol...
The response of a monoaza-15-crown-5 with an optically active aminobenzoxazinone moiety to divalent cations was investigated. The crown ether was found to undergo a strong emission shift to the blue when complexed with specific divalent metals that have ionic diameters between 1.9–2.4 . Consequ...
Benzofuran as an important heterocyclic compound is extensively found in natural products as well as synthetic materials. Since benzofuran drivatives display a diverse array of pharmacological activities, an interest in developing new biologically active agents from benzofuran is still under consideration...
In this paper, organic optoelectronic research activities in the field of benzo[1,2-c;4,5-c′]bis[1,2,5]thiadiazole (BBT)-based materials are reviewed. Synthetic pathways to the BBT core and its computational studies are described. Collective observations from separate reports suggest open-shel...
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Benzoxacystol, a new 1,4-benzoxazine-type metabolite, was produced by strain NTK 935, a marine member of the Streptomyces griseus 16S rRNA clade, isolated from deep-sea sediment collected from the Canary Basin. The structure of benzoxacystol was determined by mass spectrometry, NMR experiments...
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An enantioselective two-step route to substituted benzo[a]- and indolo[2,3-a]quinolizidines has been developed. It consists of (i) a stereoselective cyclocondensation of a racemic or prochiral δ-oxo(di)ester with either (S)-(3,4-dimethoxyphenyl)alaninol or (S)-tryptophanol in a process...
摘要: PURPOSE: To obtain a new benzo[a]fluorene compd. having estrogenic activity and anti-estrogenic activity and useful in anti-estrogen therapy, anti-reproductive potential therapy, anti-neoplasm therapy, the prevention of bone damage, etc.收藏...