Synthetic method of benzothiazole derivative

The invention provides a synthetic method of a benzothiazole derivative. In a synthetic method of a compound shown as a formula 1, i.e., (2-(1hydro-benzothiazole-2radical)-4,5,6,7-tetrahydro-2hydro-indazole-3-alcohol), reaction raw materials are readily available, reaction operation is simple and convenient, product yield can be over 40 percent, the purity is over 95 percent and can be up to 98 percent, the yield and purity are very high, and high repeatability is realized. A highly-practicable synthetic method is provided for the compound shown as the formula I, and a reliable source is provided for further research of the compound shown as the formula 1.