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Phosphine-Catalyzed [3+2] Cycloadditions of 2-Phenyl-4-Arylidene-5(4H)-Oxazolones with Allenoate: A Concise Synthesis of Aspartic Acid Analogues

You-Quan Zou, Chao Li, Jian Rong, Hao Yan, Jia-Rong Chen*, Wen-Jing Xiao*
Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, P. R. of China
Fax: +86(27)67862041; e-Mail: wxiao@mail.ccnu.edu.cn;