摘要
对氟苯甲醛经Wittig反应和水解反应得到(Z)-5-(4-氟苯基)-4-戊烯酸(3),与(S)-4-苯基-2-噁唑烷酮(4)缩合、N-[4-(苄氧基)苯亚甲基]-4-氟苯胺(6)加成后,在N,O-双(三甲基硅烷基)乙酰胺和氟化四正丁铵三水合物的作用下环合,经Shi氧化得到(3R,4S)-4-[4-(苄氧基)苯基]-1-(4-氟苯基)-3-[[(2S,3R)-3-(4-氟苯基)-2-环氧基]甲基]-2-氮杂环丁酮(10),再经二苯联硒开环、钯炭催化氢化得到胆固醇吸收抑制剂依折麦布,总收率约7%,(S)-羟基de值大于99%。
ABSTRASCT: (3 R,4S) -4- [ 4- (Benzyloxy) phenyl]- 1- ( 4-flurophenyl) -3- [ [ (2S,3R) -3- ( 4-fluorophenyl) oxiran-2- yl] methyl] azetidin-2-one (10) was synthesized from 4-fluorobenzaldehyde via Wittig reaction, hydrolysis, condensation with (S)-4-phenyloxazolidin-2-one, addition with N-[4-(benzyloxy)benzylidene]-4-fluoroaniline and cyclization in the presence of BSA and TBAF·3H2O. Compound 10 was converted to ezetimibe by Shi reaction, ring-opening with diphenyldiselenide and Pd/C catalytic hydrogenation with an overall yield of about 7% and (S) -hydroxyl de 〉 99%. Key Words: ezetimibe; antilipemic agent; hypocholesterolemic agent; asymmetric synthesis
出处
《中国医药工业杂志》
CAS
CSCD
北大核心
2013年第5期424-428,共5页
Chinese Journal of Pharmaceuticals