Preparation of indan-1-one and 1-methyl-4,5-benzindan-3-one
✍ Scribed by Aziz-Ur Rahman; Alicia E. Gastaminza
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 248 KB
- Volume
- 81
- Category
- Article
- ISSN
- 0165-0513
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✦ Synopsis
Abstract
The methods of preparation of indan‐1‐one and 1‐methyl‐4,5‐benzindan‐3‐one have been reviewed; the former has been prepared by Friedel‐Craft's condensation of β‐chloropropionyl chloride and benzene via β‐chloropropiophenone, while the latter was obtained by the cyclisation of β‐2‐naphthylbutyric acid, prepared either, by malonic ester synthesis on α‐chloro‐α‐(2‐naphthyl)ethane or by a Reformatsky reaction on 2‐acetylnaphthalene.
📜 SIMILAR VOLUMES
## Abstract The hydrazone **1** reacts with DMFDMA to give 2‐dimethylaminomethylene‐3‐(phenylhydrazono)‐indan‐1‐one **(2)** which reacts with hydrazine hydrate and the pyrazole derivative **4** to afford the indenopyrazole derivatives **3** and the indenofluorene **5** respectively. The reaction of
In the molecule of the title compound, C 9 H 9 N 3 O, the dihedral angle between the planar rings is 7.49 (3) . In the crystal structure, intermolecular N-HÁ Á ÁO hydrogen bonds link the molecules into dimers, which may be effective in the stabilization of the crystal structure.