- Insertion of the o -Aminophenol Core into Ninhydrin-Phenol Adducts: Migration of Ninhydrin Carbon Leading to N -Phenylbenzoate-Substituted Phthalimides
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An unexpected migration of a ninhydrin carbon bearing a phenolic subunit has been observed when phenolic adducts of ninhydrin reacted with 2-aminophenol in butan-1-ol at the reflux temperature. The products were unambiguously assigned as 2-(1,3-dioxoisoin
- Das, Suven,Dutta, Arpita,Maity, Suvendu,Ghosh, Prasanta,Mahali, Kalachand
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- Formation of benzo[b]indeno [2,1-d]furanone ring system during alkylation of 2-(2-hydroxyaryl)2-hydroxy-1,3-indanedione derivatives
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During alkylation of 2-(2-hydroxyaryl)-2-hydroxy-1,3-indanedione derivatives, O-alkylated benzo[b]indeno[2,1-d]furanone derivatives were formed in appreciable amounts.
- Song, Hyun Nam,Seong, Mi Ra,Lee, Hong Jung,Kim, Jae Nyoung
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- A simple synthesis of benzodiazonines from C-2 arylated 1, 3-indanediones
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A simple, facile, one-pot procedure for the synthesis of substituted benzodiazonines from phenolic adducts of ninhydrin is described. The process involves a base-catalyzed rearrangement followed by condensation of 1,3-propanediamine to furnish nine-member
- Das, Suven,Dutta, Arpita
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p. 701 - 707
(2016/05/09)
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- INDANONE DERIVATIVES, PHARMACEUTICALLY ACCEPTABLE SALTS OR OPTICAL ISOMERS THEREOF, PREPARATION METHOD FOR SAME, AND PHARMACEUTICAL COMPOSITIONS CONTAINING SAME AS ACTIVE INGREDIENT FOR PREVENTING OR TREATING VIRAL DISEASES
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The present invention relates to a novel indanone derivative, pharmaceutically acceptable salts or optical isomers thereof, a preparation method for same, and a pharmaceutical composition containing same as an active ingredient for preventing or treating
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Paragraph 0050
(2014/05/07)
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- A simple synthesis of 4-substituted 2,3-benzoxazinones from C-2 arylated 1,3-indanediones
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A simple one-pot procedure for the conversion of 2-hydroxy-2-(2′- hydroxy-aryl)-1,3-indanediones to 4-substituted benzoxazinones has been developed. The process constitutes an interesting acid-catalyzed rearrangement followed by condensation with hydroxyl
- Das, Suven,Koley, Pradyot,Pramanik, Animesh
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scheme or table
p. 3243 - 3246
(2011/06/28)
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- Friedel-Crafts type reactions of some activated cyclic ketones with phenol derivatives
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Friedel-Crafts type reactions of phenol derivatives with some cyclic ketones such as ninhydrin (1), alloxan (2), isatin (3), and parabanic acid (4) were examined. 2-Monoaryl- and 2,2-diaryl-1,3-indanedione derivatives were obtained depending on the acid catalyst in the cases of ninhydrin and alloxan. In the case of isatin, the corresponding diarylated derivative was obtained as the sole product in high yields. Parabanic acid was unreactive under the reaction conditions.
- Song, Hyun Nam,Lee, Hong Jung,Kim, Hyoung Rae,Ryu, Eung K.,Kim, Jae Nyoung
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p. 3303 - 3311
(2007/10/03)
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