Results 81 to 90 of about 255 (109)
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Tetrahedron Letters, 1984
Abstract Antileukemic benzo[ C ]phenanthridine alkaloids, fagaronine (1a) and nitidine (1c) were synthesized from the corresponding protoberberines through C 6 -N bond fission and subsequent cyclization between C 6 and C 13 position of the protoberberines.
Miyoji Hanaoka +3 more
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Abstract Antileukemic benzo[ C ]phenanthridine alkaloids, fagaronine (1a) and nitidine (1c) were synthesized from the corresponding protoberberines through C 6 -N bond fission and subsequent cyclization between C 6 and C 13 position of the protoberberines.
Miyoji Hanaoka +3 more
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A Biomimetic Synthesis of Benzo[c]Phenanthridine Alkaloid Nitidine
Israel Journal of Chemistry, 1977AbstractOxidation of 1,2,3,4‐tetrahydro‐7‐hydroxy‐6‐methoxy‐3‐(4,5‐dimethoxy‐2‐vinylphenyl)‐2‐methylisoquinoline (10), derived from the corresponding berbine methiodide (8), with lead tetraacetate, followed by acidic treatments, gave 5,6‐dihydro‐8‐hydroxy‐2,3,9‐trimethoxy‐5‐methylbenzo[c]phenenthridine (20). By a similar procedure, 1,2,3,4‐tetrahydro‐7‐
Tetsuji Kametani +4 more
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ChemInform Abstract: Heterocycles. Part 12. Chiral Benzo[c]phenanthridines.
Chemischer Informationsdienst, 1982AbstractDas Epoxylacton (I) wird stereospezifisch mit Methylamin (II) unter Inversion zum Lactam (III) umgesetzt und mit Lithiumaluminiumhydrid zu (IV) reduziert.
Y. HARIGAYA +3 more
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Synthesis of oxidative dihydroxy metabolites of benzo[c]phenanthridines
Tetrahedron, 2013Abstract The synthesis of dihydroxybenzo[ c ]phenanthridines is described. 6-Bromo-2,3-dihydroxybenzaldehyde was reacted with naphtho[2,3- d ][1,3]dioxol-5-amine via reductive amination to give the corresponding diol 19 , which was subsequently protected with ethoxymethyl chloride (EOMCl).
Jakub Stýskala +2 more
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Synthesis of new benzo[c]phenanthridine derivatives
Russian Journal of Organic Chemistry, 2010Three-component condensation of naphthalen-1-amine with triethyl orthoformate and dimedone or cyclopentane-1,3-dione, as well as the reaction of naphthalen-1-amine with 2-acetyl-5,5-dimethylcyclohexane-1,3-dione, gave the corresponding 2-[1-(α-naphthylamino)alkylidene]cycloalkane-1,3-diones which underwent intramolecular cyclization to 7,8,9,10 ...
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Interaction of oligonucleotides with benzo[c]phenanthridine alkaloid sanguilutine
Chemical Papers, 2013AbstractBenzo[c]phenanthridine alkaloid sanguilutine was extracted and purified from the dried roots of Sanguinaria canadensis. The interaction of the positively charged iminium form of alkaloid with double-stranded DNA oligonucleotides was studied using luminescence spectroscopy.
Rybáková, Stanislava +6 more
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ChemInform, 1999
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Takeshi Nakanishi, Masanobu Suzuki
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Takeshi Nakanishi, Masanobu Suzuki
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A simple and efficient synthetic route to benzo[c]phenanthridines
Tetrahedron Letters, 1995Abstract The benzo[c]phenanthridine nucleus has been prepared in an overall yield of 52–58% in five stages. Synthetic route employs as key steps the intramolecular cyclisation of vinyl alcohols followed by a novel one pot double oxidation using iodine in ethanol.
Denis Séraphin +2 more
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ChemInform Abstract: A Versatile Synthesis of Benzo(c)phenanthridine Alkaloids.
ChemInform, 1996AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
G. R. GEEN +3 more
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ChemInform Abstract: Synthesis of New Benzo[c]phenanthridine Derivatives.
ChemInform, 2011AbstractThree component condensation of naphthylamine (I) with triethyl orthoformate and dimedone or reaction of amine (I) with 2‐acetylcyclohexanedione deivatives (VI) affords corresponding enamino diketones (IV) and (VIII), resp., which undergo PPA‐mediated intramolecular cyclizations to furnish new benzophenanthridine derivatives in good yields.
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