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.

Paper | Regular issue | Vol 34, No. 9, 1992, pp.1749-1758
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6070
General Synthesis of 2,3-Substituted 5-Membered Heterocyclic Quinones

Mahmoud Cherif, Philippe Cotelle,* and Jean-Pierre Catteau

*Laboratoire de Chimie Organique Physique, URA CNRS 351, U. S. T. Lille, Villeneuve d’ Ascq, France


4,7-Dimethoxybenzo[b]furan, -thiophene, -selenophene and 4,7-dimethoxyindole have been prepared by a two-step procedure involving a cyclization-dehydration of the acetals (1). The oxidative demethylation of 4,7-dimethoxybenzo[b]thiophene, -selenophene and 4,7-dimethoxyindole afforded the corresponding quinones whereas 4,7-dimethoxybenzo[b]furan gave 5,5’-bisbenzo[b]furan-1,4-dionyl (4b).