Online article for Non-subscribers

Pay per view

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact:

Price: ¥ 4,400 (Yen only)
Period: This Article can be accessed for 7 days.

Communication | Regular issue | Vol 19, No. 2, 1982, pp.213-215
Published online, 1st January, 1970
DOI: 10.3987/R-1982-02-0213
Photochamical cis, trans-Isomerization in the 2,3-Diphenylpiperazine Series

L. Benadjila-Iguersira, J. Chastanet, and G. Roussi

*Institut de Chimie des Substances Naturelles, Centre National de la Recherche Scientifique, Avenue de la Terrasse, Bat. 27, 91198 Gif-sur-Yvette Cedex, France


Irradiation of cis diphenyl substituted piperazines 2a, b (R = Me, H) in acetonitrile solution results in their conversion to trans compounds 1a, b (R = Me, H) while in the case of 2C (R = CH2ø) no isomerization is observed. On the other hand, none of the three trans-piperazines isomerizes under the same conditions. A general mechanism is proposed.