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【结 构 式】

【分子编号】27569

【品名】tert-butyl (3R)-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]-3-(6-butyl-3-formyl-2-pyridinyl)propanoate

【CA登记号】

【 分 子 式 】C34H53NO5Si

【 分 子 量 】583.88406

【元素组成】C 69.94% H 9.15% N 2.4% O 13.7% Si 4.81%

与该中间体有关的原料药合成路线共 3 条

合成路线1

该中间体在本合成路线中的序号:(XXIII)

Pyridone (XII) was converted to its dianion with LDA and then alkylated with propyl bromide to give the butyl pyridone (XIII). This was converted into bromopyridine (XIV) by subsequent treatment with PBr3. The nitrile group of (XIV) was then reduced to aldehyde (XV) using diisobutylaluminum hydride. The aldehye (XV) underwent a Heck reaction with tert-butyl acrylate (XVI) using tri-o-tolylphosphine and a palladium catalyst to provide unsaturated ester (XVII). Further condensation of the aldehyde group of (XVII) with (S,S)-pseudoephedrine (XVIII) produced the chiral oxazolidine (XIX). Alcohol (XI) was then protected as the silyl ether (XXI) using tert-butyldimethylsilyl chloride. After its conversion to the organolithium reagent with tert-butyllithium, addition to pyridyl acrylate (XIX) gave intermediate (XXII), and further acidic work-up removed the chiral auxiliary to afford aldehyde (XXIII).

1 Frey, L.F.; Devine, P.N.; Tschaen, D.M.; Dolling, U.H.; Tillyer, R.D.; Kato, Y. (Banyu Pharmaceutical Co., Ltd.; Merck & Co., Inc.); Stereoselective deoxygenation reaction. EP 0923557; JP 1999514676; WO 9806700 .
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) 27558 (2S)-3-(2-bromo-5-methoxyphenyl)-2-methyl-1-propanol C11H15BrO2 详情 详情
(XII) 27560 6-methyl-2-oxo-1,2-dihydro-3-pyridinecarbonitrile 4241-27-4 C7H6N2O 详情 详情
(XIII) 27561 6-butyl-2-oxo-1,2-dihydro-3-pyridinecarbonitrile C10H12N2O 详情 详情
(XIV) 27562 2-bromo-6-butylnicotinonitrile C10H11BrN2 详情 详情
(XV) 27563 2-bromo-6-butylnicotinaldehyde C10H12BrNO 详情 详情
(XVI) 12760 tert-butyl acrylate 1663-39-4 C7H12O2 详情 详情
(XVII) 27564 tert-butyl (E)-3-(6-butyl-3-formyl-2-pyridinyl)-2-propenoate C17H23NO3 详情 详情
(XVIII) 27565 (1S,2S)-2-amino-1-phenyl-1-propanol C9H13NO 详情 详情
(XIX) 27566 tert-butyl (E)-3-[6-butyl-3-[(4S,5S)-3,4-dimethyl-5-phenyl-1,3-oxazolidin-2-yl]-2-pyridinyl]-2-propenoate C27H36N2O3 详情 详情
(XX) 10255 Imidazole; 1H-Imidazole 288-32-4 C3H4N2 详情 详情
(XXI) 27567 4-bromo-3-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)phenyl methyl ether C17H29BrO2Si 详情 详情
(XXII) 27568 tert-butyl (3R)-3-[6-butyl-3-[(4S,5S)-3,4-dimethyl-5-phenyl-1,3-oxazolidin-2-yl]-2-pyridinyl]-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]propanoate C44H66N2O5Si 详情 详情
(XXIII) 27569 tert-butyl (3R)-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]-3-(6-butyl-3-formyl-2-pyridinyl)propanoate C34H53NO5Si 详情 详情

合成路线2

该中间体在本合成路线中的序号:(XXIII)

Addition of Grignard reagent (XXIV) to this aldehyde (XXIII) at -78 C produced the diastereomeric mixture of alcohols (XXV), which was oxidized to ketone (XXVI) with tetrapropylammonium perruthenate (TPAP) and N-methylmorpholine N-oxide. The tert-butyl ester group of (XXVI) was then transesterified with n-butanol and Ti(OBu)4 to ester (XXVII). Cyclization of ketoester (XXVII) was performed in the presence of lithium hexamethyldisilazide to produce the cyclopentapyridine system (XXVIII). This mixture of tertiary alcohols was deoxygenated with triethylsilane and a Lewis acid to yield (XXIX) as the major diastereoisomer.

1 Frey, L.F.; Devine, P.N.; Tschaen, D.M.; Dolling, U.H.; Tillyer, R.D.; Kato, Y. (Banyu Pharmaceutical Co., Ltd.; Merck & Co., Inc.); Stereoselective deoxygenation reaction. EP 0923557; JP 1999514676; WO 9806700 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XXIII) 27569 tert-butyl (3R)-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]-3-(6-butyl-3-formyl-2-pyridinyl)propanoate C34H53NO5Si 详情 详情
(XXIV) 27570 1,3-benzodioxol-5-yl(bromo)magnesium C7H5BrMgO2 详情 详情
(XXV) 27571 tert-butyl (3R)-3-[3-[1,3-benzodioxol-5-yl(hydroxy)methyl]-6-butyl-2-pyridinyl]-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]propanoate C41H59NO7Si 详情 详情
(XXVI) 27572 tert-butyl (3R)-3-[3-(1,3-benzodioxol-5-ylcarbonyl)-6-butyl-2-pyridinyl]-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]propanoate C41H57NO7Si 详情 详情
(XXVII) 27573 butyl (3R)-3-[3-(1,3-benzodioxol-5-ylcarbonyl)-6-butyl-2-pyridinyl]-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]propanoate C41H57NO7Si 详情 详情
(XXVIII) 27574 butyl (6S,7R)-5-(1,3-benzodioxol-5-yl)-2-butyl-7-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]-5-hydroxy-6,7-dihydro-5H-cyclopenta[b]pyridine-6-carboxylate C41H57NO7Si 详情 详情
(XXIX) 27575 butyl (5S,6R,7R)-5-(1,3-benzodioxol-5-yl)-2-butyl-7-[2-[(2S)-3-hydroxy-2-methylpropyl]-4-methoxyphenyl]-6,7-dihydro-5H-cyclopenta[b]pyridine-6-carboxylate C35H43NO6 详情 详情

合成路线3

该中间体在本合成路线中的序号:(XVIII)

The cyclization of the intermediate 3-(6-butyl-3-formylpyridin-2-yl)-2(E)-propenoic acid tert-butyl ester (VI) with the chiral auxiliary (XV) by means of AcOH gives the chiral oxazolidine (XVI), which is enantioselectively condensed with the intermediate 3-(2-bromo-5-methoxyphenyl)-2(S)-methyl-1-propanol tert-butyldimethylsilyl ether (XIV) by means of n-BuLi to yield the adduct (XVII). Elimination of the chiral auxiliary with citric acid affords the aldehyde (XVIII), which is treated with 1,3-benzodioxol-5-ylmagnesium bromide (XIX) to provide the corresponding secondary alcohol (XX). Alternatively, the cyclization of the intermediate 3-(6-butyl-3-formylpyidin-2-yl)-2(E)-propenoic acid tert-butyl ester (VI) with the chiral auxiliary (XXI) by means of AcOH gives the chiral oxazolidine (XXII), which is enantioselectively condensed with the intermediate 3-(2-bromo-5-methoxyphenyl)-2(S)-methyl-1-propanol tert-butyldimethylsilyl ether (XIV) by means of n-BuLi to yield the adduct (XXIII). Elimination of the chiral auxiliary with citric acid affords the previously reported aldehyde (XVIII).

1 Song, Z.J.; et al.; Practical asymetric synthesis of an endothelin receptor antagonist. J Org Chem 1999, 64, 26, 9658.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(VI) 27564 tert-butyl (E)-3-(6-butyl-3-formyl-2-pyridinyl)-2-propenoate C17H23NO3 详情 详情
(XIV) 27567 4-bromo-3-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)phenyl methyl ether C17H29BrO2Si 详情 详情
(XV) 38554 (1S,2R)-1-(methylamino)-2,3-dihydro-1H-inden-2-ol C10H13NO 详情 详情
(XVI) 38555 tert-butyl (E)-3-[6-butyl-3-(3-methyl-2,3-dihydro-1,3-benzoxazol-2-yl)-2-pyridinyl]-2-propenoate C24H30N2O3 详情 详情
(XVII) 38556 tert-butyl (3R)-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]-3-[6-butyl-3-(3-methyl-2,3-dihydro-1,3-benzoxazol-2-yl)-2-pyridinyl]propanoate C41H60N2O5Si 详情 详情
(XVIII) 27569 tert-butyl (3R)-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]-3-(6-butyl-3-formyl-2-pyridinyl)propanoate C34H53NO5Si 详情 详情
(XIX) 27570 1,3-benzodioxol-5-yl(bromo)magnesium C7H5BrMgO2 详情 详情
(XX) 38557 tert-butyl (3R)-3-[3-[(R)-1,3-benzodioxol-5-yl(hydroxy)methyl]-6-butyl-2-pyridinyl]-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]propanoate C41H59NO7Si 详情 详情
(XXI) 34409 (1S,2S)-2-(methylamino)-1-phenyl-1-propanol 90-82-4 C10H15NO 详情 详情
(XXII) 27566 tert-butyl (E)-3-[6-butyl-3-[(4S,5S)-3,4-dimethyl-5-phenyl-1,3-oxazolidin-2-yl]-2-pyridinyl]-2-propenoate C27H36N2O3 详情 详情
(XXIII) 27568 tert-butyl (3R)-3-[6-butyl-3-[(4S,5S)-3,4-dimethyl-5-phenyl-1,3-oxazolidin-2-yl]-2-pyridinyl]-3-[2-((2S)-3-[[tert-butyl(dimethyl)silyl]oxy]-2-methylpropyl)-4-methoxyphenyl]propanoate C44H66N2O5Si 详情 详情
Extended Information