【J. Org. Chem. 2011, 76, 684–687】 反应操作 General Procedure for the Synthesis of (S,2S)-3a. The nickel-(II) complex of glycine (S)-1a (200 mg, 0.40 mmol) was dissolved in DMF (2 mL). Sodium hydroxide (19.2 mg, 0.48 mmol) was added at ambient temperature. Next 1,1,1-trifluoro-4-iodo butane 2a (104 mg, 0.44 mmol) was added and the reaction mixture was stirred for 0.5 h. The reaction was quenched by pouring the crude reaction mixture over 30 mL of aq. sat. NH4Cl. The suspension was extracted with ethyl acetate (3 times). The combined organic layers were dried with MgSO4, concentrated, and purified by column chromatography on silica gel (petroleum ether/ethyl acetate =1/1) to give (S,2S)-3a as a red solid. 其他应用: 不对称羟醛缩合反应制备手性β羟基氨基酸 【Tetrahedron 1996, 52, 12433–12442】 不对称Michael加成反应 【Org. Lett. 2000, 2, 747–750】 不对称Mannich反应合成α,β-二氨基酸 【Tetrahedron Lett. 1997, 38, 4671–4674】 【J. Org. Chem. 2008, 21, 8563–8570】 |
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