【结 构 式】 |
【分子编号】38975 【品名】(3S,5R)-1-[(2S,4R)-5-[(3aS,8aR)-2,2-dimethyl-8,8a-dihydro-2H-indeno[1,2-d][1,3]oxazol-3(3aH)-yl]-4-benzyl-2-hydroxy-5-oxopentyl]-3,5-dibenzyl-2-pyrrolidinone 【CA登记号】 |
【 分 子 式 】C42H46N2O4 【 分 子 量 】642.83832 【元素组成】C 78.47% H 7.21% N 4.36% O 9.96% |
合成路线1
该中间体在本合成路线中的序号:(VIII)Wittig reaction of N-(benzyloxycarbonyl)-L-phenylalaninal (I) with methyl (triphenylphosphoranylidene)acetate produced unsaturated ester (II). Double bond reduction in (II) with concomitant cyclization and N-deprotection upon treatment with Mg in MeOH furnished (R)-5-benzyl-2-pyrrolidinone (III), which was further protected as the N-Boc derivative (IV) (1). Alkylation of (IV) with benzyl bromide in the presence of LDA in THF at -78 C provided the trans-3,5-dimethylpyrrolidinone (V) as the predominant diastereoisomer. After Boc group cleavage using trifluoroacetic acid, pyrrolidinone (VI) was coupled with epoxide (VII) yielding adduct (VIII). The acetonide protecting group of (VIII) was finally hydrolyzed with HCl to give the title compound.
【1】 Kazmierski, W.; Andrews, W. III; Baker, C.; et al.; Heterocyclic isosteres of the P1/P2 domain of amprenavir: Discovery of novel, picomolar HIV-1 protease inhibitors. 219th ACS Natl Meet (March 26 2000, San Francisco) 2000, Abst MEDI 126. |
【2】 Tung, R.D.; Salituro, F.G.; Deininger, D.D.; Bhisetti, G.R.; Baker, C.T.; Spaltenstein, A.; Kazmierski, W.M.; Andrews, C.W. III (Vertex Pharmaceuticals Inc.); Aspartyl protease inhibitors. JP 2000501111; US 5945413; WO 9727180 . |
中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
---|---|---|---|---|---|---|
12912 | 1-(Bromomethyl)benzene; Alpha-bromotoluene | 100-39-0 | C7H7Br | 详情 | 详情 | |
14689 | Methyl (triphenylphosphoranylidene)acetate; (methoxycarbonylmethylene)triphenylphosphorane;Methyl 2-(triphenyl-lambda(5)-phosphanylidene)acetate | 2605-67-6 | C21H19O2P | 详情 | 详情 | |
(I) | 16586 | benzyl N-[(1S)-1-benzyl-2-oxoethyl]carbamate | C17H17NO3 | 详情 | 详情 | |
(II) | 38970 | methyl (E,4S)-4-[[(benzyloxy)carbonyl]amino]-5-phenyl-2-pentenoate | C20H21NO4 | 详情 | 详情 | |
(III) | 38971 | (5R)-5-benzyl-2-pyrrolidinone | C11H13NO | 详情 | 详情 | |
(IV) | 38972 | tert-butyl (2R)-2-benzyl-5-oxo-1-pyrrolidinecarboxylate | C16H21NO3 | 详情 | 详情 | |
(V) | 38973 | tert-butyl (3S,5R)-3,5-dibenzyl-2-oxo-1-pyrrolidinecarboxylate | C23H27NO3 | 详情 | 详情 | |
(VI) | 38974 | (3S,5R)-3,5-dibenzyl-2-pyrrolidinone | C18H19NO | 详情 | 详情 | |
(VII) | 16243 | (2R)-1-[(3aS,8aR)-2,2-dimethyl-8,8a-dihydro-2H-indeno[1,2-d][1,3]oxazol-3(3aH)-yl]-2-benzyl-3-[(2S)oxiranyl]-1-propanone | C24H27NO3 | 详情 | 详情 | |
(VIII) | 38975 | (3S,5R)-1-[(2S,4R)-5-[(3aS,8aR)-2,2-dimethyl-8,8a-dihydro-2H-indeno[1,2-d][1,3]oxazol-3(3aH)-yl]-4-benzyl-2-hydroxy-5-oxopentyl]-3,5-dibenzyl-2-pyrrolidinone | C42H46N2O4 | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号:(III)The title compound has been prepared by two related ways. The alkylation of 2-fluoro-4-hydroxybenzonitrile (I) with 3,4-(methylenedioxy)benzyl chloride (II) afforded ether (III). This was coupled with (R,S)-2-hydroxy-2-(2-methylphenyl)acetic acid (IV) in the presence of NaH in DMSO to produce the racemic adduct (V). Resolution was then achieved by fractional crystallization of the diastereoisomeric salts with (-)-ephedrine to furnish the desired (S)-enantiomer, which was finally isolated as the corresponding sodium salt.
【1】 Astles, P.C.; Brown, T.J.; Halley, F.; et al.; Selective ETA antagonists. 5. Discovery and structure-activity relationships of phenoxyphenylacetic acid derivatives. J Med Chem 2000, 43, 5, 900. |
【2】 Porter, B.; Astles, P.C.; Bridge, A.W.; McLay, I.M.; Van Sickle, A.P.; Walsh, R.J.A.; McCarthy, C.; Morley, A.D.; Halley, F.; Harris, N.V.; Majid, T.N.; Smith, C. (Rhône-Poulenc Rorer Ltd.); Substd. phenyl cpds. as endothelin antagonists. US 6048893; US 6124343; WO 9622978 . |
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) | 20094 | 2,4-dihydroxybenzaldehyde | 95-01-2 | C7H6O3 | 详情 | 详情 |
(II) | 28617 | 5-(chloromethyl)-1,3-benzodioxole | C8H7ClO2 | 详情 | 详情 | |
(III) | 38975 | (3S,5R)-1-[(2S,4R)-5-[(3aS,8aR)-2,2-dimethyl-8,8a-dihydro-2H-indeno[1,2-d][1,3]oxazol-3(3aH)-yl]-4-benzyl-2-hydroxy-5-oxopentyl]-3,5-dibenzyl-2-pyrrolidinone | C42H46N2O4 | 详情 | 详情 | |
(IV) | 38977 | 2-hydroxy-2-(2-methylphenyl)acetic acid | C9H10O3 | 详情 | 详情 | |
(V) | 38978 | 2-[5-(1,3-benzodioxol-5-ylmethoxy)-2-cyanophenoxy]-2-(2-methylphenyl)acetic acid | C24H19NO6 | 详情 | 详情 |