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84987298458
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18844406970
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The preparation of 2 has been described: Abarbri, M.; Guignard, A.; Lamant, M. Helv. Chim. Acta 1995, 78, 109. Jung, M. E.; Jachiet, D.; Rohloff, J. R. Tetrahedron Lett. 1989, 30, 4211. Unfortunately, the product thus obtained is not optically pure. A short route to 2 that safeguards optical integrity was developed via (i) double methylation of phenolic and carboxy units of the N-carbomethoxy-L-tyrosine; (ii) LAH reduction of the ester; and (iii) carbamate cleavage. Details are provided as Supporting Information.
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23
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23044522210
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Structure confirmed by X-ray crystallography. Compound 13: Ousmer, M.; Braun, N. A.; Ciufolini, M. A.; Perrin, M. Z Kristallogr. NCS 2000, 215, 597. Compound 15: Ousmer, M.; Braun, N. A.; Ciufolini, M. A.; Perrin, M.; Bavoux, C. Z. Kristallogr. NCS. Submitted.
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24
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0003317277
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Submitted
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Structure confirmed by X-ray crystallography. Compound 13: Ousmer, M.; Braun, N. A.; Ciufolini, M. A.; Perrin, M. Z Kristallogr. NCS 2000, 215, 597. Compound 15: Ousmer, M.; Braun, N. A.; Ciufolini, M. A.; Perrin, M.; Bavoux, C. Z. Kristallogr. NCS. Submitted.
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