化学合成。
化学合成
合成路线 1（1. 合成：449758-17-2）
产率：100%
合成条件：at 100℃; for 12 h; Inert atmosphere
实验步骤：方案2. 5-溴吡唑22a和22b的合成。 试剂和条件：a）DHP（xs），TFA（0.1当量），100℃，12小时（20a和20b的定量）;
参考文献：
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