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【结 构 式】 
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【分子编号】43324 【品名】(4S,5S)-4-(3,4-difluorophenyl)-5-methyl-1,3-oxazolidin-2-one 【CA登记号】 |
【 分 子 式 】C10H9F2NO2 【 分 子 量 】213.1838064 【元素组成】C 56.34% H 4.26% F 17.82% N 6.57% O 15.01% |
合成路线1
该中间体在本合成路线中的序号：(IX)The addition of ethylmagnesium bromide to 3,4-difluorobenzaldehyde (I) gave alcohol (II), which was oxidized to ketone (III) by using pyridinium chlorochromate. Treatment of (III) with iodobenzene diacetate in methanolic KOH produced the hydroxy ketone (IV). This was converted to oxime (V) and subsequently reduced with LiAlH4, yielding amino alcohol (VI) as a mixture of diastereoisomers. The mixture of amino alcohols (VI) was treated with Boc2O to afford carbamate (VII), which was then cyclized in the presence of NaH in THF. The resulting diastereomeric mixture of oxazolidinones (VIII) was first separated by column chromatography, and the racemic trans-isomer was then resolved by means of chiral HPLC to provide the required (+)-trans-oxazolidine (IX).
| 【1】 Broten, T.P.; Nichtberger, S.A.; Siegl, P.K.S. (Merck & Co., Inc.); Combination therapy for the treatment of benign prostatic hyperplasia. WO 9948530 . |
| 【2】 Marzabadi, M.R.; Wong, W.C.; Gluchowski, C.; Tian, D.; Nagarathnam, D.; Lagu, B.; Dhar, T.G.M.; Jeon, Y.T. (Synaptic Pharmaceutical Corp.); Heterocyclic substd. piperidines and uses thereof. EP 0988295; WO 9857940 . |
| 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) | 26654 | 3,4-difluorobenzaldehyde | 34036-07-2 | C7H4F2O | 详情 | 详情 |
| (II) | 43317 | 1-(3,4-difluorophenyl)-1-propanol | C9H10F2O | 详情 | 详情 | |
| (III) | 43318 | 1-(3,4-difluorophenyl)-1-propanone | 23384-72-7 | C9H8F2O | 详情 | 详情 |
| (IV) | 43319 | 1-(3,4-difluorophenyl)-2-hydroxy-1-propanone | C9H8F2O2 | 详情 | 详情 | |
| (V) | 43320 | 1-(3,4-difluorophenyl)-2-hydroxy-1-propanone oxime | C9H9F2NO2 | 详情 | 详情 | |
| (VI) | 43321 | 1-amino-1-(3,4-difluorophenyl)-2-propanol | C9H11F2NO | 详情 | 详情 | |
| (VII) | 43322 | tert-butyl 1-(3,4-difluorophenyl)-2-hydroxypropylcarbamate | C14H19F2NO3 | 详情 | 详情 | |
| (VIII) | 43323 | 4-(3,4-difluorophenyl)-5-methyl-1,3-oxazolidin-2-one | C10H9F2NO2 | 详情 | 详情 | |
| (IX) | 43324 | (4S,5S)-4-(3,4-difluorophenyl)-5-methyl-1,3-oxazolidin-2-one | C10H9F2NO2 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(IX)Addition of 4-fluorophenylmagnesium bromide (XIII) to 1-benzyl-4-piperidinone (XII) afforded carbinol (XIV), which was dehydrated to the tetrahydropyridine (XV) by treatment with p-toluenesulfonic acid in refluxing toluene. Hydrogenation of the olefin (XV) with concomitant benzyl group hydrogenolysis gave 4-(4-fluorophenyl)piperidine (XVI) (1). This compound was also obtained by catalytic hydrogenation of the commercially available 4-(4-fluorophenyl)-1,2,3,6-tetrahydropyridine (XVII). Alkylation of piperidine (XVI) with N-(3-bromopropyl)phthalimide (XVIII) provided adduct (XIX), which was subjected to hydrazinolysis in refluxing MeOH to furnish the primary amine (XX). Deprotonation of oxazolidine (IX) with n-butyllithium in THF at -78 C, followed by condensation with p-nitrophenyl chloroformate, gave the p-nitrophenoxycarbonyl derivative (XXI). This was finally coupled with amine (XX) to furnish the title carboxamide.
| 【1】 Tian, D.; Jeon, Y.; Lagu, B.; et al.; De novo design of a novel oxazolidinone analogue as a potent and selective alpha1A adrenergic receptor antagonist with high oral bioavailability. J Med Chem 2000, 43, 15, 2775. |
| 【2】 Broten, T.P.; Nichtberger, S.A.; Siegl, P.K.S. (Merck & Co., Inc.); Combination therapy for the treatment of benign prostatic hyperplasia. WO 9948530 . |
| 【3】 Marzabadi, M.R.; Wong, W.C.; Gluchowski, C.; Tian, D.; Nagarathnam, D.; Lagu, B.; Dhar, T.G.M.; Jeon, Y.T. (Synaptic Pharmaceutical Corp.); Heterocyclic substd. piperidines and uses thereof. EP 0988295; WO 9857940 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (IX) | 43324 | (4S,5S)-4-(3,4-difluorophenyl)-5-methyl-1,3-oxazolidin-2-one | C10H9F2NO2 | 详情 | 详情 | |
| (XII) | 15720 | 1-benzyltetrahydro-4(1H)-pyridinone; 1-Benzyl-4-piperidone; N-Benzyl-4-piperidone; 1-(benzyl)-4-piperidinone; 1-benzylpiperidin-4-one; 1-(benzyl)piperidin-4-one | 3612-20-2 | C12H15NO | 详情 | 详情 |
| (XIII) | 13643 | 4-fluorophenyl magnesium bromide;Bromo(4-fluorophenyl)magnesium;bromo(p-fluorophenyl)Magnesium;p-Fluorophenylmagnesium bromide | 352-13-6 | C6H4BrFMg | 详情 | 详情 |
| (XIV) | 15722 | 1-benzyl-4-(4-fluorophenyl)-4-piperidinol | C18H20FNO | 详情 | 详情 | |
| (XV) | 43327 | 1-benzyl-4-(4-fluorophenyl)-1,2,3,6-tetrahydropyridine | C18H18FN | 详情 | 详情 | |
| (XVI) | 39299 | 4-(4-fluorophenyl)piperidine | 37656-48-7 | C11H14FN | 详情 | 详情 |
| (XVII) | 23465 | 4-(4-fluorophenyl)-1,2,3,6-tetrahydropyridine | 1978-59-2 | C11H12FN | 详情 | 详情 |
| (XVIII) | 15216 | N-(3-Bromopropyl)phthalimide; 2-(3-bromopropyl)-1H-isoindole-1,3(2H)-dione | 5460-29-7 | C11H10BrNO2 | 详情 | 详情 |
| (XIX) | 39300 | 2-[3-[4-(4-fluorophenyl)-1-piperidinyl]propyl]-1H-isoindole-1,3(2H)-dione | C22H23FN2O2 | 详情 | 详情 | |
| (XX) | 39302 | 3-[4-(4-fluorophenyl)-1-piperidinyl]propylamine; 3-[4-(4-fluorophenyl)-1-piperidinyl]-1-propanamine | C14H21FN2 | 详情 | 详情 | |
| (XXI) | 43328 | 4-nitrophenyl (4S,5S)-4-(3,4-difluorophenyl)-5-methyl-2-oxo-1,3-oxazolidine-3-carboxylate | C17H12F2N2O6 | 详情 | 详情 |
合成路线3
该中间体在本合成路线中的序号：(X)The reaction of (S)-(+)-methyl lactate (I) with pyrrolidine (II) gives the corresponding acyl pyrrolidine (III), which is silylated with Tbdms-Cl and imidazole to yield the silyl ether (IV). The condensation of (IV) with 3,4-difluorobromobenzene (V) by means of BuLi in THF affords the chiral propiophenone derivative (VI), which is treated with hydroxylamine and NaOAc in methanol to provide the corresponding oxime (VII). The reduction of (VII) with LiAlH4 in refluxing ethyl ether gives the expected amine (VIII), which is treated with (Boc)2O in chloroform, yielding the carbamate (IX). The cyclization of (IX) by means of NaH in THF gives a mixture of cis- and trans-oxazolidinones, from which the desired trans-(4S,5S)-isomer (X) is separated by flash chromatography. The reaction of (X) with 4-nitrophenyl chloroformate (XI) by means of NaH yields the oxazolidinone-carboxylate (XII), which is finally condensed with 3-[4-(4-fluorophenyl)piperidin-1-yl]propylamine (XIII) in THF to afford the target amide.
| 【1】 Lagu, B.; Wetzel, J.M.; Forray, C.; Patane, M.A.; Bock, M.G.; Determination of the relative and absolute stereochemistry of a potent and alpha1A-selective adrenoceptor antagonist. Bioorg Med Chem Lett 2000, 10, 24, 2705. |
| 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) | 17075 | propionic acid, 2-hydroxy-, methyl ester, (S)-; methyl (2S)-2-hydroxypropanoate | 27871-49-4 | C4H8O3 | 详情 | 详情 |
| (II) | 11376 | Pyrrolidine | 123-75-1 | C4H9N | 详情 | 详情 |
| (III) | 17099 | (2S)-2-hydroxy-1-(1-pyrrolidinyl)-1-propanone | C7H13NO2 | 详情 | 详情 | |
| (IV) | 51565 | (2S)-2-[[tert-butyl(dimethyl)silyl]oxy]-1-(1-pyrrolidinyl)-1-propanone | C13H27NO2Si | 详情 | 详情 | |
| (V) | 51566 | 1-Bromo-3,4-difluorobenzene; 3,4-Difluorobromobenzene; 4-Bromo-1,2-difluorobenzene | 348-61-8 | C6H3BrF2 | 详情 | 详情 |
| (VI) | 51567 | (2S)-2-[[tert-butyl(dimethyl)silyl]oxy]-1-(3,4-difluorophenyl)-1-propanone | C15H22F2O2Si | 详情 | 详情 | |
| (VII) | 51568 | (2S)-2-[[tert-butyl(dimethyl)silyl]oxy]-1-(3,4-difluorophenyl)-1-propanone oxime | C15H23F2NO2Si | 详情 | 详情 | |
| (VIII) | 51569 | (2S)-1-amino-1-(3,4-difluorophenyl)-2-propanol | C9H11F2NO | 详情 | 详情 | |
| (IX) | 51570 | tert-butyl (2S)-1-(3,4-difluorophenyl)-2-hydroxypropylcarbamate | C14H19F2NO3 | 详情 | 详情 | |
| (X) | 43324 | (4S,5S)-4-(3,4-difluorophenyl)-5-methyl-1,3-oxazolidin-2-one | C10H9F2NO2 | 详情 | 详情 | |
| (XI) | 16605 | 4-Nitrophenyl chloroformate; 1-[(Chlorocarbonyl)oxy]-4-nitrobenzene | 7693-46-1 | C7H4ClNO4 | 详情 | 详情 |
| (XII) | 43325 | 3,4-difluorobenzylamine; (3,4-difluorophenyl)methanamine | 72235-53-1 | C7H7F2N | 详情 | 详情 |
| (XIII) | 39302 | 3-[4-(4-fluorophenyl)-1-piperidinyl]propylamine; 3-[4-(4-fluorophenyl)-1-piperidinyl]-1-propanamine | C14H21FN2 | 详情 | 详情 |