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Formal Total Synthesis of (

±±±

)-Trichodiene via Claisen Rearrangement and Robinson Annulation

Jae-Chul Junga, Young-Jo Jungb, and Oee-Sook Parkc

aDepartment of Neuroscience and Medical Research Institute, College of Medicine, Ewha Womans University, Ewha Global Challenge BK21, Seoul 158-710, South Korea

bUnion Chemical Corporation, Cheongju 361-290, Chungbuk, South Korea

cDepartment of Chemistry, Institute for Basic Sciences, College of Natural Sciences, Chungbuk National University, Cheongju 361-763, Chungbuk, South Korea

Reprint requests to Prof. Oee-Sook Park. Fax: +82-43-267-227. E-mail: ospark@cbnu.ac.kr Z. Naturforsch.2008,63b,293 – 297; received October 23, 2007

A facile formal total synthesis of (±)-trichodiene was achieved by employing Claisen rearrange- ment and Robinson annulation as synthetic key strategies.

Key words:(±)-Trichodiene, Claisen Rearrangement, Robinson Annulation

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