化学合成。
化学合成
合成路线 1（1. 合成：17200-29-2）
产率：96%
合成条件：With tungstate sulfuric acid In neat (no solvent) at 80 - 90℃; for 0.07 h;
实验步骤：通用方法：向原酸酯（1.1mmol）和邻氨基苯酚或邻氨基苯硫酚（1mmol）的混合物中加入TSA（1mol％）。 根据表4，将混合物在80-90℃搅拌适当的时间。反应完成后（如TLC所示），将混合物用氯仿（10mL）稀释，并通过过滤分离催化剂。 通过柱色谱法实现进一步纯化
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