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30544452734
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5 The enantiomeric excess of 3a (99% ee) was determined by means of chiral HPLC analysis. [CHIRALCEL OJ-H, 0.46 cm (Ø) × 25 cm (L), n-hexane-ethanol = 90:10,1.0 mL/min, minor: 28.8 min, major: 31.3 min].
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35
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30544438766
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note
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1H NMR spectrum with that of 3i (Scheme 1). (Diagram presented). Scheme 1.
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