Photocyclization of 2-(N-Benzoyl-N-benzylamino)ethyl Benzoylacetate via Remote Hydrogen Abstraction. Enhancing Effect on Biradical Cyclization by theN-Benzoyl Group

Tadashi Hasegawa,Takashi Anma,Satoko Suzuki,Yutaka Maeda,Ernst Horn

Bulletin of the Chemical Society of Japan（2007）

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摘要

Upon irradiation 2-(N-benzoyl-N-benzylamino)ethyl benzoylacetate underwent photocyclization to give 8-membered azalactones in high yields. Intramolecular hydrogen bonding between the hydroxy and benzoyl carbonyl group in the 1,8-biradical intermediate produced from the benzoylacetate enhanced the photocyclization.

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关键词

biradical photocyclization,remote hydrogen abstraction,hydrogen abstraction,n-benzoyl-n-benzylamino,then-benzoyl

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