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Title: | A convenient method for the preparation of 4 - n - alkyl - 4'' -cyano - p - terphenyl |
Authors: | Sadashiva, B.K. Subba Rao, G.S.R. |
Issue Date: | 1977 |
Publisher: | Gordon and Breach Science Publishers. |
Citation: | Molecular Crystals and Liquid Crystals, 1977, Vol.38, p345-352 |
Abstract: | A new and general procedure for the preparation of 4-n-alkyl-4'' -cyano-p-terphenyl is described starting from p-terphenyl. This procedure consists of the Friedel-Crafts reaction on p-terphenyl with an acyl halide and reducing the resulting ketone by the Wolff-Kishner method to the 4-n-alkyl-p-terphenyl. This is acylated with acetyl chloride to the corresponding 4-n-alkyl-4''- acetyl-p-terphenyl, which in turn is oxidised to the carboxylic acid. This acid is converted to the amide through its acid chloride. Dehydration of this amide affords the desired 4-n-alkyl-4''- cyano-p-terphenyl. This convenient method offers better yields than the procedure of Gray et al.1 and could also be utilised for the preparation of 4-n-alkoxy-, and 4-n-alkyl-4' -cyano biphenyls. In addition to the cyano derivatives, some intermediate compounds also exhibit mesomorphic properties. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/2763 |
ISSN: | 1058-725X |
Alternative Location: | http://dx.doi.org/10.1080/15421407708084398 |
Copyright: | 1977 OPA (Overseas Publishers Association) N.V. |
Appears in Collections: | Research Papers (SCM) |
Files in This Item:
File | Description | Size | Format | |
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1977 MCLC V38 p345.pdf Restricted Access | Restricted Access | 287.88 kB | Adobe PDF | View/Open Request a copy |
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