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Communication | Regular issue | Vol 34, No. 11, 1992, pp.2061-2064
Published online, 1st January, 1970
DOI: 10.3987/COM-92-6153
A Facile Synthesis of Highly Functionalized Unsymmetrical Heterobiaryls Utilizing the Intramolecular Ullmann Coupling Reaction Directed by Salicyl Alcohol as a Template

Masami Takahashi, Tooru Kurada, Tsuyoshi Ogiku, Hiroshi Ohmizu, Kazuhiko Kondo, and Tameo Iwasaki*

*Department of Synthetic Chemistry, Research Laboratory of Applied Biochemistry, Tanabe Seiyaku Co., Ltd., 16-89 Kashima, Yodogawa, Osaka 532, Japan

Abstract

Heterobiaryls (4) were synthesized in good yields utilizing the intramolecular Ullmann coupling reaction directed by salicyl alcohol as a template. The regioselective cleavage of the two ester bonds of 4 gave the highly functionalized unsymmetrical heterobiaryls having substituents which are incompatible with organometallic reagents.