Synthesis of Some 2-(Naphthyl) Benzimidazoles and Benzo- 1, 5,-Diazepines for Pesticide Research, by the Reaction of O-Phenylenediamine With Naphthyl-Acrylophenones

A Li S. El-Sayed¹, B. Haggag² and Khairy A. M. El-~Bayouki¹

Al-Azhar University, Nasr City, Cairo, Egypt National Reseqrch Centre, Dokki Cairo,Egypt.

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ABSTRACT:

Naphthyl-acrylophenones 1 are found to react with Q-phenylenediamine (bath temperature) yielding 2-(naphthyl) benzimidazoles 2 via cleavage of the ethylenic C=C bond. 2b and d are found to react with the diamine inn butanol giving the hitherto unknown benzo- 1,5-diazepmes 4. Electronic, i.r. and 1Hnmr spectra of the latter products as well as the reaction mechanism leading to the formation of the products 2 are discussed.

KEYWORDS:

Benzimidazoles; O-Phenylenediamine