3-Hydroxymethylglutarimide 、
2-(3,5-dimethyl-2-oxo-3,4-dihydro-1H-pyridin-6-yl)acetic acid 在
4-二甲氨基吡啶 、
N,N'-二环己基碳二亚胺 作用下,
生成 (2,6-dioxopiperidin-4-yl)methyl (2Z)-2-[(3R,5S)-3,5-dimethyl-6-oxopiperidin-2-ylidene]acetate 、 (2,6-dioxopiperidin-4-yl)methyl (2Z)-2-[(3S,5R)-3,5-dimethyl-6-oxopiperidin-2-ylidene]acetate 、