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0040341782
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The overall yield of 11 from 3 was 30% in seven steps. Synthesis of 11 from L-glutamic acid was also reported by Koert et al. (21% overall yiled, eight steps); U. Koert, M. Stein, and K. Harms, Liebig. Ann., 1995, 1415, and references cited therein.
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85086806580
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note
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2O, MeOH-THF, 0 °C, 12/13 = 57/43 (99%), (5) L-Selectride, THF, -78 °C, 12/13 = 8/92 (99%).
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23
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