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The invention discloses a according to the method for synthesizing intermediate folds mai bu, comprises the following steps: in under the nitrogen atmosphere, of formula (2) compound are added to in tetrahydrofuran to obtain solution A, A the solution temperature to 5 C to 10 C, and to the solution of (-) – A dropping two different pine pinane base chlorine borane, stirring the reaction, after the reaction is finished to obtain solution B, the solution B cooling to – 20 C to 0 C, aqueous solution of […], adjusting solution B of pH=5 – 8, the ethyl acetate extract adjusting pH of the solution B, evaporate ethyl acetate to obtain the residue C, to the remainder of the organic solvent is added in the C, standing, pouring the organic solvent, the residue obtained D, D to the residue in toluene is added to obtain solution E, heating and stirring solution after E, natural cooling, the solution is put into the freezing environment in E, filtering, drying formula (1) compound of the solid, the method is simple and easy, and the cost is low. The reaction is shown as follows: (by machine translation)
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Recommanded Product: 189028-95-3, you can also check out more blogs about189028-95-3
Reference：
Oxazolidine – Wikipedia,
Oxazolidine | C3H2833NO – PubChem