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 38, No. 7, 1994, pp.1453-1457
Published online, 1st January, 1970
DOI: 10.3987/COM-94-6715
Formation of a Strained Triazapentalenoindene Skeleton via the Rearrangement of 2,3-Dihydro-7-nitro-1H-Imidazo[2,1-a]phthalazin-4-ium-6-olate Effected by Dichloroacetic Anhydride

Mónika Fuxreiter, Antal Csámpai,* and János Császár

*Department of Organic Chemistry, Eötvös Loránd University Budapest, H-1518 Budapest 112, P.O.Box 32, Hungary


On treatment with dichloroacetic anhydride 2,3-dihydro-7-nitro-1H-imidazo[2,1-a]phthalazin-4-ium-6-olate (5) underwent a backbone rearrangement leading to isoindole derivative (12), which represents a new strained ring system with three condensed five-membered heterocycles. The structure of its stable 3-deacylated form, 3,3a,5a-triaza-1,1-dichloro-1,2,3,3a,4,5,6,6a-octahydro-7-nitropentaleno[3a,3-a]indene-2,6-dione (13) was evidenced by ir, ms, nmr, and X-ray methods.