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【结 构 式】 
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【药物名称】RPR-106541 【化学名称】16alpha,17alpha-[(R)-Butylidenedioxy]-6alpha,9alpha-difluoro-11beta-hydroxy-17beta-(methylsulfanyl)androst-4-en-3-one 【CA登记号】159001-35-1, 159001-36-2 ((S)-isomer), 158952-32-0 (undefined isomer) 【 分 子 式 】C24H34F2O4S 【 分 子 量 】456.59698 |
【开发单位】Aventis Pharma (Originator) 【药理作用】Antiallergy/Antiasthmatic Drugs, Asthma Therapy, RESPIRATORY DRUGS, Corticosteroids, Glucocorticoid Receptor Agonists |
合成路线1
Hydrolysis of the known acetonide (I) with formic acid at 80 C afforded the trihydroxy compound (II) (1). Subsequent ketalization of (II) with butyraldehyde (III) in the presence of perchloric acid provided the butylidene ketal (IVa-b) as a 4:1 mixture of R/S epimers at C-20. Selective hydrogenation of the 1-2 double bond of (IVa-b) by iron pentacaarbonyl/sodium hydroxide gave (V). The carboxylate group of (V) was then activated as the mixed anhydride (VI) by reaction with diethyl chlorophosphate and Et3N. Condensation of anhydride (VI) with the sodium salt of N-hydroxypyridine-2-thione (VII) produced the pyridyl ester (VIII). Photolysis of ester (VIII) by irradiation with a tungsten lamp in the presence of dimethyl disulfide gave rise to the target methyl thioether as a diastereomeric mixture. The major (20R)-epimer was finally isolated by preparative HPLC.
| 【1】 Ashton, M.J.; et al.; Anti-inflammatory 17beta-thioalkyl-16alpha, 17alpha-ketal and -acetal androstanes: A new class of airway selective steroids for the treatment of asthma. J Med Chem 1996, 39, 25, 4888. |
| 【2】 Ashton, M.J.; Karlsson, S.J.-A.; Vacher, B.Y.J.; Withnall, M.T. (Aventis Pharma SA); New steroids. EP 0675897; JP 1996504806; WO 9414834 . |
| 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) | 59446 | (4aS,4bR,5S,6aS,9aR,10aS,10bS,12S)-4b,12-difluoro-5-hydroxy-4a,6a,8,8-tetramethyl-2-oxo-2,4a,4b,5,6,6a,9a,10,10a,10b,11,12-dodecahydro-6bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxole-6b-carboxylic acid | C23H28F2O6 | 详情 | 详情 | |
| (II) | 59447 | (6S,8S,9R,10S,11S,13S,14S,16R,17S)-6,9-difluoro-11,16,17-trihydroxy-10,13-dimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthrene-17-carboxylic acid | C20H24F2O6 | 详情 | 详情 | |
| (III) | 23694 | butyraldehyde | 123-72-8 | C4H8O | 详情 | 详情 |
| (IV) | 59448 | (4aS,4bR,5S,6aS,8R,9aR,10aS,10bS,12S)-4b,12-difluoro-5-hydroxy-4a,6a-dimethyl-2-oxo-8-propyl-2,4a,4b,5,6,6a,9a,10,10a,10b,11,12-dodecahydro-6bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxole-6b-carboxylic acid | C24H30F2O6 | 详情 | 详情 | |
| (V) | 59449 | (4aS,4bR,5S,6aS,8S,9aR,10aS,10bS,12S)-4b,12-difluoro-5-hydroxy-4a,6a-dimethyl-2-oxo-8-propyl-2,4a,4b,5,6,6a,9a,10,10a,10b,11,12-dodecahydro-6bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxole-6b-carboxylic acid | C24H30F2O6 | 详情 | 详情 | |
| (VI) | 47372 | (4aS,4bR,5S,6aS,8R,9aR,10aS,10bS,12S)-4b,12-difluoro-5-hydroxy-4a,6a-dimethyl-2-oxo-8-propyl-2,3,4,4a,4b,5,6,6a,9a,10,10a,10b,11,12-tetradecahydro-6bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxole-6b-carboxylic acid | C24H32F2O6 | 详情 | 详情 | |
| (VII) | 59450 | [(4aS,4bR,5S,6aS,8R,9aR,10aS,10bS,12S)-4b,12-difluoro-5-hydroxy-4a,6a-dimethyl-2-oxo-8-propyl-2,4a,4b,5,6,6a,9a,10,10a,10b,11,12-dodecahydro-6bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-6-yl]carbonyl diethyl phosphate | C28H39F2O9P | 详情 | 详情 | |
| (VIII) | 59451 | sodium 2-thioxo-1(2H)-pyridinolate | C5H4NNaOS | 详情 | 详情 | |
| (IX) | 59452 | (4aS,4bR,5S,6aS,6bS,9aR,10aS,10bS,12S)-4b,12-difluoro-5-hydroxy-4a,6a-dimethyl-8-propyl-6b-({[2-thioxo-1(2H)-pyridinyl]oxy}carbonyl)-4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-dodecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-2-one | C29H33F2NO6S | 详情 | 详情 |
合成路线2
In a related method, the dihydroxy steroid (IX) was converted to the 11-acetate ester (XI) via diacetylation with Ac2O and DMAP, followed by selective hydrolysis of the resultant 11,21-diacetate (X) under acidic conditions. Oxidative cleavage of the hydroxy ketone moiety of (XI) using periodic acid furnished the carboxylic acid (XII). The 1,2-double bond of (XII) was selectively reduced by hydrogenation in the presence of tris(triphenylphosphine)rhodium chloride to yield (XIII). Activation of (XIII) as the corresponding mixed anhydride with diethyl chlorophosphate, followed by coupling with N-hydroxy-2-thiopyridone (XIV), furnished the pyridyl ester (XV). Radical decarboxylation of (XV) in the presence of dimethyl disulfide gave rise to the methyl thioether (XVI). The acetate ester of (XVI) was finally hydrolyzed using LiOH in aqueous EtOH or, alternatively, K2CO3, NaOH or KOH in MeOH/H2O.
| 【1】 Bridge, A.W.; Mcfarlane, I.M.; Parkinson, N.C. (Aventis Pharma SA); Process for the preparation of (20R)-16alpha, 17alpha-butylidenedioxy-6alpha, 9alpha-difluoro-11beta-hydroxy-17beta-(methylthio)androst-4-en-3-one. WO 9631524 . |
| 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) | 47570 | (4aS,4bR,5S,6aS,6bS,8R,9aR,10aS,10bS,12S)-4b,12-difluoro-6b-glycoloyl-5-hydroxy-4a,6a-dimethyl-8-propyl-4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-dodecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-2-one | C25H32F2O6 | 详情 | 详情 | |
| (X) | 59453 | 2-[(4aS,4bR,5S,6aS,8R,9aR,10aS,10bS,12S)-5-(acetyloxy)-4b,12-difluoro-4a,6a-dimethyl-2-oxo-8-propyl-2,4a,4b,5,6,6a,9a,10,10a,10b,11,12-dodecahydro-6bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-6-yl]-2-oxoethyl acetate | C29H36F2O8 | 详情 | 详情 | |
| (XI) | 59454 | (4aS,4bR,5S,6aS,6bS,8R,9aR,10aS,10bS,12S)-4b,12-difluoro-6b-glycoloyl-4a,6a-dimethyl-2-oxo-8-propyl-4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-dodecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-5-yl acetate | C27H34F2O7 | 详情 | 详情 | |
| (XII) | 59455 | (4aS,4bR,5S,6aS,8R,9aR,10aS,10bS,12S)-5-(acetyloxy)-4b,12-difluoro-4a,6a-dimethyl-2-oxo-8-propyl-2,4a,4b,5,6,6a,9a,10,10a,10b,11,12-dodecahydro-6bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxole-6b-carboxylic acid | C26H32F2O7 | 详情 | 详情 | |
| (XIII) | 59456 | (4aS,4bR,5S,6aS,8R,9aR,10aS,10bS,12S)-5-(acetyloxy)-4b,12-difluoro-4a,6a-dimethyl-2-oxo-8-propyl-2,3,4,4a,4b,5,6,6a,9a,10,10a,10b,11,12-tetradecahydro-6bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxole-6b-carboxylic acid | C26H34F2O7 | 详情 | 详情 | |
| (XIV) | 59457 | 1-hydroxy-2(1H)-pyridinethione | C5H5NOS | 详情 | 详情 | |
| (XV) | 59458 | (4aS,4bR,5S,6aS,6bS,9aR,10aS,10bS,12S)-4b,12-difluoro-4a,6a-dimethyl-2-oxo-8-propyl-6b-({[2-thioxo-1(2H)-pyridinyl]oxy}carbonyl)-4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-dodecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-5-yl acetate | C31H35F2NO7S | 详情 | 详情 | |
| (XVI) | 59459 | (4aS,4bR,5S,6aS,6bR,8R,9aR,10aS,10bS,12S)-4b,12-difluoro-4a,6a-dimethyl-6b-(methylsulfanyl)-2-oxo-8-propyl-3,4,4a,4b,5,6,6a,6b,9a,10,10a,10b,11,12-tetradecahydro-2H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-5-yl acetate | C26H36F2O5S | 详情 | 详情 |