Protected <i>syn</i>-Aldol Compounds from Direct, Catalytic, and Enantioselective Reactions of <i>N</i>-Acyl-1,3-oxazinane-2-thiones with Aromatic Acetals
作者:Miguel Mellado-Hidalgo、Elias A. Romero-Cavagnaro、Sajanthanaa Nageswaran、Sabrina Puddu、Stuart C. D. Kennington、Anna M. Costa、Pedro Romea、Fèlix Urpí、Gabriel Aullón、Mercè Font-Bardia
DOI:10.1021/acs.orglett.2c04254
日期:2023.2.3
A direct and asymmetric syn-aldol reaction of N-acyl-1,3-oxazinane-2-thiones with dialkyl acetals from aromatic acetals in the presence of 2–5 mol % [DTBM-SEGPHOS]NiCl2, TMSOTf, and lutidine has been developed. It has been established that the oxazinanethione heterocycle, used for the first time as a scaffold in asymmetric carbon–carbon bond-forming reactions, can be smoothly removed to give access
在 2–5 mol % [DTBM-SEGPHOS]NiCl 2、TMSOTf 和二甲基吡啶存在下, N -acyl-1,3-oxazinane-2-thiones 与来自芳香族缩醛的二烷基缩醛的直接和不对称顺式-aldol反应具有被开发。已经确定,首次用作不对称碳-碳键形成反应支架的恶嗪硫酮杂环可以顺利去除,从而获得各种具有高合成价值的对映体纯化合物。