189028-95-3, Chemical engineers work across a number of sectors, processes differ within each of these areas, but chemistry and chemical engineering roles are found throughout in the manufacturing process of chemical products. 189028-95-3, Name is (S)-3-((S)-5-(4-Fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one, molecular formula is C20H20FNO4
The invention provides an Ezetimibe synthesis method comprising the following steps: (a) a compound (5) is subjected to asymmetric reduction reaction to obtain a compound (6), and the compound (6) and tert-butyldimethylsilyl chloride react in an organic solution under the action of alkali to obtain a compound (7); (b) the compound (7) and diisopropylethylamine are dissolved in the organic solution, titanium tetrachloride is added in the organic solution to react at 20-50 DEG C, and a compound (3) is added in the organic solution at minus 20 to minus 60 DEG C to react to obtain a compound (8); (c) the compound (8) and N,O-bis(trimethylsilyl) acetamide react in the organic solution at 20-80 DEG C, tetrabutylammonium fluoride trihydrate is added into the organic solution to react at 20-80 DEG C to obtain a compound (9); (d) the compound (9) is subjected to off-protection reaction to obtain Ezetimibe, wherein R is equal to TBS, Ac or COOCH2CCl3. The invention further provides an Ezetimibe intermediate and a preparation method thereof.
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Reference：
Oxazolidine – Wikipedia,
Oxazolidine | C3H2828NO – PubChem