条件: Stage #1: With methanol; sodium hydride In tetrahydrofuran; mineral oil at 20℃, for 1h; Stage #2: 20℃, for 38h; Stage #3: With citric acid In water
收率: 28%
参考文献: Patent: US2011/152273, 2011, A1. Location in patent: Page/Page column 87;Journal of Organic Chemistry, 1979, vol. 44, p.2299-2300