Volume 45, Issue 4 pp. 957-962
Article

Regio- and stereoselective synthesis of isoxazolidine derivatives by asymmetric 1,3-dipolar cycloaddition reaction of chiral nitrones with 1-propene-1,3-sultone

Hong-Kui Zhang

Corresponding Author

Hong-Kui Zhang

Department of Chemistry, Xiamen University, Xiamen 361005, China

Department of Chemistry, Xiamen University, Xiamen 361005, ChinaSearch for more papers by this author
Wing-Hong Chan

Wing-Hong Chan

Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China

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Albert W. M. Leeb

Albert W. M. Leeb

Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China

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Wai-Yeung Wong

Wai-Yeung Wong

Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China

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First published: 13 March 2009
Citations: 8

Abstract

chemical structure image

Asymmetric 1,3-dipolar cycloadditions of chiral nitrones to 1-propene-1,3-sultone (1) were investigated. Chiral nitrones 6a-e reacted with sultone 1 in toluene at 90 °C for 24-36 h to give the corresponding isoxazolidines in moderate yields with high regioselectivities and stereoselectivities. The diastereoselectivity of this reaction varied with the choice of dipolarophile and the steric demands of nitrones. When sultone 1 was allowed to react chiral nitrone 6e, a much better diastereoselectivity of up to 5.1:1 was observed.

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