+++Synthetic Communications

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An Improved Large-Scale Preparation of Benzimidazole-2-Sulfonic Acids and 2-Chlorobenzimidazoles. 1

Authors: Jack M. Hinkley a; Anthony R. Porcari a; John A. Walker II b; Eric E. Swayze c; Leroy B. Townsen

Published in: Synthetic Communications, Volume 28, Issue 9 May 1998 , pages 1703 – 1712

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http://dx.doi.org/10.1080/00397919808006874

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большое спасибо!