化学合成。
化学合成
合成路线 1（1. 合成：4623-24-9）
产率：98%
合成条件：With iron; ammonium chloride In ethanol; water at 85℃; for 1 h;
实验步骤：通用方法：向2（150.1mg，0.66mmol）和NH 4 Cl（183.6mg，3.43mmol）在EtOH / H 2 O（5：1,6mL）的混合物中的溶液中加入铁（Fe）粉末（184.4mg， 3.30mmol）并在85℃下剧烈搅拌1小时。 将混合物冷却至室温后，通过硅藻土垫过滤除去固体，浓缩滤液。 通过柱色谱（EtOAc /己烷，20：70）纯化残余物，得到呈棕色油状的10a（99.2mg，76％）;
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