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【结 构 式】

【药物名称】RPR-111905

【化学名称】(+)-(3aS,4S,6S,7aR)-2-[4-Hydroxy-4-(2-methoxyphenyl)-2-[2(S)-(2-methoxyphenyl)propionyl]perhydroisoindol-6-yl]acetonitrile

【CA登记号】

【 分 子 式 】C27H32N2O4

【 分 子 量 】448.56709

【开发单位】Aventis Pharma (Originator)

【药理作用】ANALGESIC AND ANESTHETIC DRUGS, Analgesic Drugs, Antiallergy/Antiasthmatic Drugs, Asthma Therapy, Non-Opioid Analgesics, RESPIRATORY DRUGS, Non-Steroidal Antiinflammatory Drugs, Tachykinin NK1 Antagonists

合成路线1

The condensation of racemic (3aRS,4RS,6SR,7aSR)-6-(hydroxymethyl)-4-(2-methoxyphenyl)perhydroisoindol-4-ol (I) with 2(S)-(2-methoxyphenyl)propionic acid (II) by means of hydroxybenzotriazole and 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide in dichloromethane gives the diastereomeric amide (III), which is tosylated with tosyl chloride and submitted to chromatography yielding the (3aS,4S,6R,7aR)(S)-enantiomer (IV) as an optically pure isomer. Finally, this compound is allowed to react with potassium cyanide in hot DMSO affording RPR-111905. The starting compounds, the perhydroisoindole (I) and the propionic acid (II) have been obtained as follows: a) The cyclization of 5-(acetoxymethyl)-2-cyclohexen-1-one (V) with N-(butoxymethyl)-N-(trimethylsilylmethyl)benzylamine (VI) by means of trifluoroacetic acid (TFA) in dichloromethane gives racemic (3aRS,6SR,7aSR)-6-(acetoxymethyl)-2-benzylperhydroisoinol-4-one (VII), which is submitted to a Grignard condensation with 2-methoxyphenylmagnesium bromide (VIII) in THF yielding the racemic (3aRS,4RS,6SR,7aSR)(IX). Finally, this compound is debenzylated by hydrogenation with H2 over Pd/C in hot ethanol affording the desired racemic diol (I). b) The condensation of 2-(2-methoxyphenyl)acetic acid (X) with (4S,5S)-4-methyl-5-phenyloxazolidin-2-one (XI) by means of NaH, pivaloyl chloride and butyllithium gives the acylated oxazolidinone (XII), which is methylated regioselectively with sodium hexamethyldisylazane (Na-HMDS) and methyl iodide in THF yielding the 2(S)-methyl derivative (XIII). Finally, the hydrolysis of the oxazolidinone group of (XIII) with LiOH in THF-water affords the desired 2(S)-(2-methoxyphenyl)propionic acid (II).

1 Mutti, S.; et al.; Practical enantiospecific synthesis of RPR 111905: A novel non-peptide substance P antagonist. Tetrahedron Lett 1996, 37, 48, 8743.
2 Achard, D.; Peyronel, J.-F.; Tabart, M. (Aventis Pharma SA); Perhydroisoindole derivs. as antagonists of substance P. FR 2727411; JP 1998509970; US 5739351; WO 9616939 .
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) 19697 (3aS,4R,6R,7aR)-6-(hydroxymethyl)-4-(2-methoxyphenyl)octahydro-1H-isoindol-4-ol C16H23NO3 详情 详情
(II) 19698 (2S)-2-(2-methoxyphenyl)propionic acid C10H12O3 详情 详情
(III) 19699 (2S)-1-[(4S,6R)-4-hydroxy-6-(hydroxymethyl)-4-(2-methoxyphenyl)octahydro-2H-isoindol-2-yl]-2-(2-methoxyphenyl)-1-propanone C26H33NO5 详情 详情
(IV) 19700 [(3aR,5R,7R,7aS)-7-hydroxy-7-(2-methoxyphenyl)-2-[(2S)-2-(2-methoxyphenyl)propanoyl]octahydro-1H-isoindol-5-yl]methyl 4-methylbenzenesulfonate C33H39NO7S 详情 详情
(V) 19701 [(1R)-5-oxo-3-cyclohexen-1-yl]methyl acetate C9H12O3 详情 详情
(VI) 19702 N-benzyl-N-(butoxymethyl)-N-[(trimethylsilyl)methyl]amine; N-(butoxymethyl)(phenyl)-N-[(trimethylsilyl)methyl]methanamine C16H29NOSi 详情 详情
(VII) 19703 [(3aR,5R,7aS)-2-benzyl-7-oxooctahydro-1H-isoindol-5-yl]methyl acetate C18H23NO3 详情 详情
(VIII) 19704 bromo(2-methoxyphenyl)magnesium C7H7BrMgO 详情 详情
(IX) 19705 (3aS,4R,6R,7aR)-2-benzyl-6-(hydroxymethyl)-4-(2-methoxyphenyl)octahydro-1H-isoindol-4-ol C23H29NO3 详情 详情
(X) 19706 2-(2-methoxyphenyl)acetic acid 93-25-4 C9H10O3 详情 详情
(XI) 19707 (4S,5S)-4-methyl-5-phenyl-1,3-oxazolidin-2-one 17097-67-5 C10H11NO2 详情 详情
(XII) 19708 (4S,5S)-3-[2-(2-methoxyphenyl)acetyl]-4-methyl-5-phenyl-1,3-oxazolidin-2-one C19H19NO4 详情 详情
(XIII) 19709 (4S,5S)-3-[(2S)-2-(2-methoxyphenyl)propanoyl]-4-methyl-5-phenyl-1,3-oxazolidin-2-one C20H21NO4 详情 详情

合成路线2

The Diels-Alder cyclization of 1-acetoxy-1,3-butadiene (XIV) with maleimide (XV) in toluene at 80 C gives racemic (3aRS,4RS,7aSR)-4-acetoxy-2,3,3a,4,7,7a-hexahydro-1H-isoindole-1,3-dione (XVI), which is reduced with LiAlH4 in THF to the racemic alcohol (XVII). Optical resolution of (XVII) with Di-p-toluoyl-L-tartaric acid in THF/ethanol/ /water yields the (3aS,4S,7aR)-isomer (XVIII), which is N-protected with tert-butoxycarbonyl anhydride to the protected compound (XIX). The Oppenauer oxidation of (XIX) catalized by aluminum isopropoxide affords the unsaturated ketone (XX), which is condensed with cyanacetic acid (XXI) by means of NaOH in toluene/water to afford the substituted cyanacetic derivative (XXII). The decarboxylation of (XXII) catalized by Cu2O in refluxing acetonitrile gives the suitably substituted ketone (XXIII), which is submitted to a Grignard condensation with 2-methoxy-phenylmagnesium bromide (XXIV) in THF yielding the alcohol (XXV) as a single isomer. The deprotection of (XXV) with HCl in THF affords compound (XXVI) with a free NH group, which is finally acylated with 2(S)-(2-methoxyphenyl)propionic acid (II) by means of SOCl2 and K2CO3 to obtain RPR-111905.

1 Mutti, S.; et al.; Practical enantiospecific synthesis of RPR 111905: A novel non-peptide substance P antagonist. Tetrahedron Lett 1996, 37, 48, 8743.
2 Achard, D.; Peyronel, J.-F.; Tabart, M. (Aventis Pharma SA); Perhydroisoindole derivs. as antagonists of substance P. FR 2727411; JP 1998509970; US 5739351; WO 9616939 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XIV) 19710 (1E)-1,3-butadienyl acetate 1515-76-0 C6H8O2 详情 详情
(XV) 19711 1H-pyrrole-2,5-dione 541-59-3 C4H3NO2 详情 详情
(XVI) 19712 (3aR,4S,7aR)-1,3-dioxo-2,3,3a,4,7,7a-hexahydro-1H-isoindol-4-yl acetate C10H11NO4 详情 详情
(XVII) 19713 (3aS,4S,7aR)-2,3,3a,4,7,7a-hexahydro-1H-isoindol-4-ol C8H13NO 详情 详情
(XIX) 19715 tert-butyl (3aS,4S,7aR)-4-hydroxy-1,3,3a,4,7,7a-hexahydro-2H-isoindole-2-carboxylate C13H23NO3 详情 详情
(XX) 19716 tert-butyl (3aS,7aR)-4-oxo-1,3,3a,4,7,7a-hexahydro-2H-isoindole-2-carboxylate C13H19NO3 详情 详情
(XXII) 19718 (2S)-2-[(3aR,5R,7aS)-2-(tert-butoxycarbonyl)-7-oxooctahydro-1H-isoindol-5-yl]-2-cyanoethanoic acid C16H22N2O5 详情 详情
(XXIII) 19719 tert-butyl (3aS,6S,7aR)-6-(cyanomethyl)-4-oxooctahydro-2H-isoindole-2-carboxylate C15H22N2O3 详情 详情
(XXV) 19721 tert-butyl (3aS,4S,6S,7aR)-6-(cyanomethyl)-4-hydroxy-4-(2-methoxyphenyl)octahydro-2H-isoindole-2-carboxylate C22H30N2O4 详情 详情
(XXVI) 19722 2-[(3aR,5S,7S,7aS)-7-hydroxy-7-(2-methoxyphenyl)octahydro-1H-isoindol-5-yl]acetonitrile C17H22N2O2 详情 详情
Extended Information