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【结 构 式】

【分子编号】58304

【品名】(4S)-3-[4-(2,4-difluorophenyl)-4-pentenoyl]-4-isopropyl-1,3-oxazolidin-2-one

【CA登记号】

【 分 子 式 】C17H19F2NO3

【 分 子 量 】323.3396064

【元素组成】C 63.15% H 5.92% F 11.75% N 4.33% O 14.84%

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:(VI)

The reaction of allyl alcohol (I) with triethyl orthoacetate at 120 C gives the 4-pentenoic ester (II), which is hydrolyzed with KOH to the corresponding free acid (III). The reaction of (III) with (COCl)2 yields the acyl chloride (IV), which is condensed with 4(S)-isopropyloxazolidin-2-one (V) (a chiral auxiliary), by means of BuLi to afford the chiral imide (VI). The diastereoselective alkylation of (VI) with benzyloxymethyl chloride (VII) by means of TiCl4 and TEA in dichloromethane provides the alkylated compound (VIII) with a diastereoselectivity of 70/30% and combined yields of 84%. The reductive elimination of the chiral auxiliary in (VIII) by means of LiAlH4 gives the alcohol (IX), which is treated with Ac2O to yield the acetate (X). The cyclization of (X) by means of I2 and pyridine in acetonitrile affords the chiral tetrahydrofuran (XI)????XI)a, which is condensed with the sodium salt of 1,2,4-triazole (XII) in hot DMF to provide the adduct (XIII). The debenzylation of (XIII) with H2 over Pd/C gives the alcohol (XIV), which is finally treated with Ts-Cl and pyridine to give rise to the target intermediate tosylate (XV) (see scheme no. 20027601a, intermediate no. (II))

1 Saksena, A.K.; Girijavallabhan, V.M.; Wang, H.Y.; Liu, Y.T.; Pike, R.E.; Ganguly, A.K.; Concise asymmetric routes to 2,2,4-trisubstituted tetrahydrofurans via chiral titanium imide enolates: Key intermediates towards synthesis of highly active azole antifungals Sch 51048 and Sch 56592. Tetrahedron Lett 1996, 37, 32, 5657.
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) 15491 2-(2,4-difluorophenyl)-2-propen-1-ol C9H8F2O 详情 详情
(II) 58303 ethyl 4-(2,4-difluorophenyl)-4-pentenoate C13H14F2O2 详情 详情
(III) 17090 4-(2,4-difluorophenyl)-4-pentenoic acid C11H10F2O2 详情 详情
(IV) 17091 4-(2,4-difluorophenyl)-4-pentenoyl chloride C11H9ClF2O 详情 详情
(V) 12867 (4S)-4-Isopropyl-1,3-oxazolidin-2-one; (R)-4-Isopropyl-2-oxazolidinone 17016-83-0 C6H11NO2 详情 详情
(VI) 58304 (4S)-3-[4-(2,4-difluorophenyl)-4-pentenoyl]-4-isopropyl-1,3-oxazolidin-2-one C17H19F2NO3 详情 详情
(VII) 14560 Benzyl chloromethyl ether; 1-[(chloromethoxy)methyl]benzene 3587-60-8 C8H9ClO 详情 详情
(VIII) 58305 (4S)-3-[(2R)-2-[(benzyloxy)methyl]-4-(2,4-difluorophenyl)-4-pentenoyl]-4-isopropyl-1,3-oxazolidin-2-one C25H27F2NO4 详情 详情
(IX) 58306 (2S)-2-[(benzyloxy)methyl]-4-(2,4-difluorophenyl)-4-penten-1-ol C19H20F2O2 详情 详情
(X) 58307 (2R)-2-[(benzyloxy)methyl]-4-(2,4-difluorophenyl)-4-pentenyl acetate C21H22F2O3 详情 详情
(XI) 58308 (2R,4R)-4-[(benzyloxy)methyl]-2-(2,4-difluorophenyl)-2-(iodomethyl)tetrahydrofuran; benzyl [(3R,5R)-5-(2,4-difluorophenyl)-5-(iodomethyl)tetrahydro-3-furanyl]methyl ether C19H19F2IO2 详情 详情
(XII) 16341 1H-1,2,4-triazol-1-ylsodium C2H2N3Na 详情 详情
(XIII) 58309 1-{[(2R,4R)-4-[(benzyloxy)methyl]-2-(2,4-difluorophenyl)tetrahydro-2-furanyl]methyl}-1H-1,2,4-triazole; benzyl [(3R,5R)-5-(2,4-difluorophenyl)-5-(1H-1,2,4-triazol-1-ylmethyl)tetrahydro-3-furanyl]methyl ether C21H21F2N3O2 详情 详情
(XIV) 16343 [(3R,5R)-5-(2,4-difluorophenyl)-5-(1H-1,2,4-triazol-1-ylmethyl)tetrahydro-3-furanyl]methanol C14H15F2N3O2 详情 详情
(XV) 16311 [(3S,5R)-5-(2,4-difluorophenyl)-5-(1H-1,2,4-triazol-1-ylmethyl)tetrahydro-3-furanyl]methyl 4-methylbenzenesulfonate C21H21F2N3O4S 详情 详情
Extended Information