A preparation method of the third chlorine pulls qin
The invention discloses a method for preparing the third chlorine pulls qin, has changed the existing method of the reaction sequence, the first to use 1 - bromo - 3 - chloro propane and 2 - chloro phenothiazine reaction, further with the third chlorine pulls qin N - methyl piperazine is generated by the reaction. This invention discloses technology can not complete reaction lead to reaction the cost is high, and has a gene toxic impurities to make the final purity of the product is difficult to achieve the medical-grade technical defect.