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3. Organoalkali compounds by radical anion induced reductive metalation of phenyl thioethers
4. a) Liu, H.; Cohen, T. J. Org. Chem., 1995, 60, 2022–2025. b) compound 5: [α]D +27 (c = 1.72, CHCl3) e.e. 98% ; compound 8: [α]D −36 (c = 2.05, CHCl3) e.e. 97% ; compound 10: [α]D −15 (c =0.83, CHCl3) e.e. 90% ; compound 11: [α]D +2.4 (c = 1.52, CHCl3) e.e. 70%.
5. Reviews of baker's yeast reductions including examples of ketones bearing sulfur groups: Servi, S. Synthesis, 1990, 1–25. Csuk, R.; Glänzer, B.I. Chem. Rev. 1991, 91, 49–97.