Summary.
Asymmetric synthesis of all four stereoisomers of 6-methylpipecolic acids with high enantiomeric purity via iterative AD reaction, starting from 1,6-heptadiene, has been described.
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Received March 25, 2002 Accepted June 15, 2002 Published online January 30, 2003
Authors' address: Hiroki Takahata, Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, Sendai 981-8558, Japan, E-mail: takahata@tohoku-pharm.ac.jp
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ID="*" The stereo-configurations of 8 and 9 in Fig. 3 and 12 in Fig. 4 show only major isomers.
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ID="**" The absolute configurations of 11 and 14
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Takahata, H., Shimizu, M. Asymmetric synthesis of all stereoisomers of 6-methylpipecolic acids. Amino Acids 24, 267–272 (2003). https://doi.org/10.1007/s00726-002-0411-8
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DOI: https://doi.org/10.1007/s00726-002-0411-8