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8552900 
Journal Article 
Internuclear cyclisation. Part II. The application of the Pschorr reaction to some substituted derivatives of o-amino-α-phenylcinnamic acid 
Hey, DH; Osbond, JM 
1949 
Yes 
Journal of the Chemical Society
ISSN: 0368-1769 
3172-3177 
English 
The Pschorr reaction has been carried out on a number of o-amino-α-phenylcinnamic acids with deactivating groups in the α-phenyl nucleus to afford the corresponding phenanthrene derivatives. These reactions, together with other examples already described in the literature, suggest that the facility of the internuclear cyclisation is not dependent to any appreciable extent on either the nature or the position of a substituent group in the α-phenyl nucleus. It is suggested that this behaviour, coupled with the results described in Part I, is characteristic of a free-radical mechanism.