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【结 构 式】

【分子编号】51486

【品名】ethyl (3R,5S,6E)-7-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]-3,5-dihydroxy-6-heptenoate

【CA登记号】

【 分 子 式 】C27H28FNO4

【 分 子 量 】449.5220632

【元素组成】C 72.14% H 6.28% F 4.23% N 3.12% O 14.24%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(XI)

A synthesis of pitavastatin has been reported: Cyclization of 2-amino-4'-fluorobenzophenone (I) with 3-cyclopropyl-3-oxopropionic acid methyl ester (II) by means of H2SO4 in refluxing acetic acid or methanesulfonic acid in refluxing benzene gives 2-cyclopropyl-4-(4-fluorophenyl)quinoline-3-carboxylic acid methyl ester (III), which is reduced with DIBAL in toluene to yield the carbinol (IV). Oxidation of compound (IV) with PCC and AcONa in dichloromethane affords carbaldehyde (V), which is condensed with tributylstannane (VI) by means of BuLi in THF to provide the enol ether (VII). Hydrolysis of (VII) by means of TsOH in THF/water gives the unsaturated carbaldehyde (VIII), which is condensed with acetoacetic ester (IX) by means of NaH and BuLi in THF to yield the 5-hydroxy-3-oxoheptenoic ester derivative (X). Stereoselective reduction of the oxo group of (X) by means of diethylmethoxyborane and NaBH4 in THF/methanol gives the racemic syn-dihydroxy compound (XI) in a syn/anti ratio of 98:2. Finally, compound (XI) is hydrolyzed with NaOH in aqueous ethanol to yield racemic pitavastatin sodium. Alternatively, the unsaturated carbaldehyde (VIII) can also be obtained by reaction of carbaldehyde (V) with phosphonate (XII) by means of NaOH in toluene/water to give the unsaturated nitrile (XIII), which is finally reduced with DIBAL in toluene to afford the target carbaldehyde (VIII).

1 Fujikawa, Y.; Suzuki, M.; Iwasaki, H.; Kitahara, M.; Sakashita, M.; Sakoda, R.; Synthesis and biological evaluations of quinolone-based HMG-CoA reductase inhibitors. Bioorg Med Chem 2001, 9, 10, 2727.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 17467 (2-aminophenyl)(4-fluorophenyl)methanone C13H10FNO 详情 详情
(II) 51482 Methyl 3-cyclopropyl-3-oxopropanoate 32249-35-7 C7H10O3 详情 详情
(III) 51483 methyl 2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinecarboxylate C20H16FNO2 详情 详情
(IV) 17472 [2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]methanol C19H16FNO 详情 详情
(V) 17425 2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinecarbaldehyde 121660-37-5 C19H14FNO 详情 详情
(VI) 51484 ethyl (E)-2-(tributylstannyl)ethenyl ether; tributyl[(E)-2-ethoxyethenyl]stannane C16H34OSn 详情 详情
(VII) 51485 (E)-1-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]-3-ethoxy-2-propen-1-ol C23H22FNO2 详情 详情
(VIII) 39666 (E)-3-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]-2-propenal C21H16FNO 详情 详情
(IX) 11819 ethyl acetoacetate; ethyl 3-oxobutanoate;Acetoacetic ester;Ethyl beta-ketobutyrate;ethyl 3-oxobutyrate 141-97-9 C6H10O3 详情 详情
(X) 39667 ethyl (E)-7-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]-5-hydroxy-3-oxo-6-heptenoate C27H26FNO4 详情 详情
(XI) 51486 ethyl (3R,5S,6E)-7-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]-3,5-dihydroxy-6-heptenoate C27H28FNO4 详情 详情
(XII) 10045 Diethyl cyanomethylphosphonate 2537-48-6 C6H12NO3P 详情 详情
(XIII) 39665 (E)-3-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]-2-propenenitrile C21H15FN2 详情 详情
Extended Information