反应详情

Add concentrated HCl (3.5 L) to a solution of N-(2,2-dimethoxyethyl)-2-(3-methoxyphenyl)-N-methylacetamide (790 g, 2.709 mol, 1.0 eq) dissolved in HOAc (3.5 L). Stir the mixture for 16 hours at room temperature. Dilute the reaction mixture with 4 L of dichloromethane and then quench slowly with 50% NaOH (4.0 L) over 2 hours. Separate the two layers. Collect the organic layer, dry over sodium sulfate and concentrate under vacuum to yield an off-white solid. The solid is put through a silica plug (1/1 hexanes/ethyl acetate) to obtain the product (Cmpd N, 460 g, 84% yield).

1. customquench slowly with 50% NaOH (4.0 L) over 2 hours
2. customSeparate the two layers
3. customCollect the organic layer
4. dry with materialdry over sodium sulfate
5. concentrationconcentrate under vacuum
6. customto yield an off-white solid
7. customto obtain the product (Cmpd N, 460 g, 84% yield)