Sunose Mihiro, T. Peakman, J. Charmant, T. Gallagher, S. Macdonald
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Regioselective directed lithiation of N -Boc-3-hydroxypyrrolidine. Synthesis of 2-substituted 4-hydroxypyrrolidines
N-Boc 3-hydroxypyrrolidine 1 undergoes directed C-lithiation at C5 and not, as previously reported, at C2; the resulting dilithiated intermediate 6 has been trapped by a range of electrophiles to give 2-substituted 4-hydroxypyrrolidines 7.
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