条件: Stage #1: With n-butyllithium In tetrahydrofuran; hexane at -80 - 20℃; Inert atmosphere;Stage #2: With hydrogenchloride In tetrahydrofuran; hexane; water at 20℃。
收率: 93.0 g(HPLC:99.0%,得率为62%)。
参考文献: Patent: CN105037408, 2017, B. Location in patent: Paragraph 0028; 0031; 0032