HETEROCYCLES

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: purchase@heterocycles.com

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

■ Role of 2-Naphthyl Ether Intermediate in Formation of Isolable Atropisomers Derived from the Coupling Reaction of (2-Hydroxy-3,3-dimethylindolin-1-yl)(substituted Phenyl)methanones with 2-Naphthol

Masashi Eto, Fumikazu Ito, Hidetoshi Sato, Itaru Shinohara, Koki Yamaguchi, Yasuyuki Yoshitake, and Kazunobu Harano*

*Laboratory of Molecular Design, Sojo University, 4-22-1, Ikeda, Kumamoto-shi, 860-0082, Japan

Abstract

The formation pathway of the atropisomers derived from the reaction of (2-hydroxy-3,3-dimethylindolin-1-yl)(4-substituted phenyl) methanones with 2-naphthol in the presence of BF3•Et2O was discussed on the basis of the isolation of the 2-naphthyl ether intermediate whose structure was determined by single crystal X-ray analysis. The results indicate that the coupling reaction proceeds through stepwise mechanism, i.e., the ether intermediate formation followed by Fries-type rearrangement.