4923-63-1Relevant academic research and scientific papers
Gold(III)-catalyzed 1,4-nucleophilic addition: Facile approach to prepare 2-amino-1,4-naphthalenedione and 6-amino-5,8-quinolinedione derivatives
Jiang, Chunhui,Wang, Shaozhong
experimental part, p. 1099 - 1102 (2009/10/14)
An efficient approach is developed to prepare different 2-amino-1,4-naphthalenedione and 6-amino-5,8-quinolinedione derivatives regioselectively by Au(III)-catalyzed 1,4-nucleophilic addition and subsequent oxidation. A wide variety of primary, secondary, and aromatic amines, as well as allylamine and 2-butynylamine are well tolerated under the mild conditions to give products in moderate to good yields. Georg Thieme Verlag Stuttgart.
Facile synthesis of 2-amino-1,4-naphthoquinones catalyzed by molecular iodine under ultrasonic irradiation
Liu, Bing,Ji, Shun-Jun
, p. 1201 - 1211 (2008/09/18)
The conjugate addition reactions of amines with 1,4-naphthoquinone were catalyzed efficiently by molecular iodine under ultrasonic irradiation to afford 2-amino-1,4-naphthoquinones in moderate to excellent yields. Copyright Taylor & Francis Group, LLC.
Synthesis and pharmacological studies of some 2-t-amino and 2,3-di-t-amino substituted 1,4-naphthoquinones and related compounds
Tandon,Singh,Rai,Chhor,Khan
, p. 304 - 310 (2007/10/03)
Series of 2-t-amino and 2,3-di-t-amino substituted -1,4-naphthoquinones have been synthesised from corresponding 1,4-naphthoquinones by reaction with secondary amines. The compounds have been evaluated for their broad spectrum antimicrobial, antiviral and
Photo-oxidation of 2-methylamino-3-(1-piperidinylmethyl)-1,4-naphthoquinone
Ohta,Hinata,Kawasaki,Yamashita
, p. 2360 - 2362 (2007/10/02)
2-Methylamino-3-(1-piperidinylmethyl)-1,4 (7) was prepared via several steps from 2-methyl-1,4-naphthoquinone (vitamin K3 3). The quinone (7) was photochemically oxidized to 2-methylamino-3-(1-piperidinylcarbonyl)-1,3-naphthoquinone (8) and/or 2-alkoxycarbonyl-3-methylamino-1,4-naphthoquinone (9), depending on the solvent used.
CONDENSATION INDOLE/NAPHTHOQUINONE. SYNTHESE D'UNE NOUVELLE SERIE D'INDOLYL-1,4-NAPHTHOQUINONES
Henrion, Jean-Christophe,Jacquet, Bernard,Hocquaux, Michel,Lion, Claude
, p. 163 - 168 (2007/10/02)
Addition of an indole, which does not have a group at the 3-position, to 1,4-naphthoquinone leads to the expected 2-(3-indolyl)-1,4-naphthoquinone.When the 1,4-naphthoquinone is substituted at the 2-position by an alkyl or aryl group, the 2-substituted 3-(3-indolyl)-1,4-naphthoquinone is easily formed.However, when the 2-substituent of the quinone is functional (OH, OMe, Cl, Br, NC5H10, S-C6H5), in addition to the new series of expected indolylnaphthoquinones, several by-products resulting from elimination of the 2-substituted and/or further reaction of these compounds are formed.The outcome at the reaction appears to be very sensitive to the experimental conditions.
Synthesis of Hydroxylated Binaphthoquinones via Amine/Hydroxyl Exchange - On the Reaction of 2,2'-Binaphthyl-1,4;1',4'-diquinones with Piperidine
Laatsch, Hartmut
, p. 1271 - 1278 (2007/10/02)
Bis-aminadducts 9a/10a, formed by reaction of piperidine with dimeric naphthoquinones of type 2, cyclize under acidic conditions yielding linear binaphthofuran-5,13;7,12-diquinones 11.The latter are hydrolyzed easily, forming 3,3'-dihydroxylated 2,2'-binaphthoquinones (1) in good yield. - Keywords: Binaphthoquinone, Bijuglone, Hydroxylation
