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【结 构 式】 
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【分子编号】40862 【品名】(2R)-2-[(2R)-6-fluoro-3,4-dihydro-2H-chromen-2-yl]-2-hydroxyethyl 4-methylbenzenesulfonate 【CA登记号】 |
【 分 子 式 】C18H19FO5S 【 分 子 量 】366.4102632 【元素组成】C 59% H 5.23% F 5.19% O 21.83% S 8.75% |
合成路线1
该中间体在本合成路线中的序号：(XX)The treatment of (XI) under the Sharpless asymmetric epoxidation conditions (but using (+)-DET and titanium tetraisopropoxide) gives, after cyclization with NaOH, 1(S)-(6-fluoro-3,4-dihydro-2H-1-benzopyran-2(R)-yl)-1,2-ethanediol (XVI), which is benzoylated with 4-nitrobenzoic acid (XVII), DEAD and PPh3 yielding the dibenzoate (XVIII), with inversion of the configuration at the OH group. The hydrolysis of (XVIII) with NaOMe in methanol affords, 1(R)-(6-fluoro-3,4-dihydro-2H-1-benzopyran-2(R)-yl)-1,2-ethanediol (XIX), which is selectively tosylated with TsCl and pyridine giving the monotosylate (XX). The cyclization of (XX) with NaOMe furnishes the expected epoxide (XXI), which is finally condensed with the previously described intermediate amine (XV).
| 【1】 Chandrasekhar, S.; Reddy, M.V.; Enantioselective total synthesis of the antihypertensive agent (S,R,R,R)-nebivolol. Tetrahedron 2000, 56, 34, 6339. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (XI) | 40855 | 4-fluoro-2-[(E)-5-hydroxy-3-pentenyl]phenol | C11H13FO2 | 详情 | 详情 | |
| (XV) | 40859 | (1R)-2-amino-1-[(2S)-6-fluoro-3,4-dihydro-2H-chromen-2-yl]-1-ethanol | C11H14FNO2 | 详情 | 详情 | |
| (XVI) | 40856 | (1R)-1-[(2S)-6-fluoro-3,4-dihydro-2H-chromen-2-yl]-1,2-ethanediol | C11H13FO3 | 详情 | 详情 | |
| (XVII) | 18119 | 4-nitrobenzoic acid; p-nitrobenzoic acid | 62-23-7 | C7H5NO4 | 详情 | 详情 |
| (XVIII) | 40860 | (1R)-1-[(2R)-6-fluoro-3,4-dihydro-2H-chromen-2-yl]-2-[(4-nitrobenzoyl)oxy]ethyl 4-nitrobenzoate | C25H19FN2O9 | 详情 | 详情 | |
| (XIX) | 40861 | (1R)-1-[(2R)-6-fluoro-3,4-dihydro-2H-chromen-2-yl]-1,2-ethanediol | C11H13FO3 | 详情 | 详情 | |
| (XX) | 40862 | (2R)-2-[(2R)-6-fluoro-3,4-dihydro-2H-chromen-2-yl]-2-hydroxyethyl 4-methylbenzenesulfonate | C18H19FO5S | 详情 | 详情 | |
| (XXI) | 40863 | (2R)-6-fluoro-2-[(2R)oxiranyl]-3,4-dihydro-2H-chromene | C11H11FO2 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(XI)
| 【1】 Trinka P, Reiter J, Beracz G, et al. 2004. New process for the preparation of racemic ([2S [2R * [R[R*]]]]) and ([2R [2S * [S[S*]]]]) -(+-)-α,α'-[imino-bis (methylene)] bis [6-fluoro-chroman-2-methanol] and its pure [2S [2R * [R[R*]]]]) -, and [2R [2S * [S[S*]]]] enantionmers. WO 2004041805. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| （XV） | 67337 | (S)-2-((S)-1,2-dihydroxyethyl)-6-fluorochroman-4-one | C11H11FO4 | 详情 | 详情 | |
| （X） | 67339 | (R)-1-((S)-6-fluorochroman-2-yl)-2-(phenylamino)ethanol | C17H18FNO2 | 详情 | 详情 | |
| (I) | 19639 | 4-fluorophenol | 371-41-5 | C6H5FO | 详情 | 详情 |
| (II) | 67331 | 2-chloro-1-(5-fluoro-2-hydroxyphenyl)ethanone | C8H6ClFO2 | 详情 | 详情 | |
| (III) | 67332 | (2-(5-fluoro-2-hydroxyphenyl)-2-oxoethyl)triphenylphosphonium chloride | C26H21ClFO2P | 详情 | 详情 | |
| (IV) | 67333 | 1-(5-fluoro-2-hydroxyphenyl)-2-(triphenylphosphoranylidene)ethanone | C26H20FO2P | 详情 | 详情 | |
| (V) | 67334 | (R,E)-3-(2,2-dimethyl-1,3-dioxolan-4-yl)-1-(5-fluoro-2-hydroxyphenyl)prop-2-en-1-one | C14H15FO4 | 详情 | 详情 | |
| (VI) | 67335 | 2-(2,2-dimethyl-1,3-dioxolan-4-yl)-6-fluorochroman-4-one | C14H15FO4 | 详情 | 详情 | |
| (VII) | 67336 | (S)-2-((R)-1,2-dihydroxyethyl)-6-fluorochroman-4-one | C11H11FO4 | 详情 | 详情 | |
| (VIII) | 40857 | (2R)-2-[(2S)-6-fluoro-3,4-dihydro-2H-chromen-2-yl]-2-hydroxyethyl 4-methylbenzenesulfonate | C18H19FO5S | 详情 | 详情 | |
| (IX) | 67338 | (S)-6-fluoro-2-((R)-oxiran-2-yl)chroman | C11H11FO2 | 详情 | 详情 | |
| (XI) | 40862 | (2R)-2-[(2R)-6-fluoro-3,4-dihydro-2H-chromen-2-yl]-2-hydroxyethyl 4-methylbenzenesulfonate | C18H19FO5S | 详情 | 详情 | |
| (XII) | 40863 | (2R)-6-fluoro-2-[(2R)oxiranyl]-3,4-dihydro-2H-chromene | C11H11FO2 | 详情 | 详情 | |
| (XIII) | 67318 | (S)-1-((R)-6-fluorochroman-2-yl)-2-(((S)-2-((S)-6-fluorochroman-2-yl)-2-hydroxyethyl)(phenyl)amino)ethanol | C28H29F2NO4 | 详情 | 详情 |