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Communication | Special issue | Vol 72, No. 1, 2007, pp.123-126
Published online, 15th December, 2006
DOI: 10.3987/COM-06-S(K)14
Crystal Structures of Coumarin-3-carbamate Derivatives with Herbicidal Activities

Hajime Takahashi, Haruko Takechi, Kanji Kubo,* and Taisuke Matsumoto

*School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido 061-0293, Japan

Abstract

Coumarin-3-carbamate derivatives were prepared by the reaction of alcohols with coumarin-3-carbonyl azide. The testosterone derivative has herbicidal activities, but the benzene derivative does not have the activities. The crystal structures of two coumarin-3-carbamate derivatives were analyzed by X-ray crystallography. The crystals of the testosterone derivative had intermolecular N–H···O, C–H···O, and C–H···π interactions.