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【结 构 式】

【分子编号】14700

【品名】N-[(1S,2S,3S,4R)-3-[2-(benzyloxy)ethyl]bicyclo[2.2.1]hept-2-yl]benzenesulfonamide

【CA登记号】

【 分 子 式 】C22H27NO3S

【 分 子 量 】385.52732

【元素组成】C 68.54% H 7.06% N 3.63% O 12.45% S 8.32%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(XL)

The condensation of propane-1,3-diol (XXV) with benzaldehyde by means of p-toluenesulfonic acid gives the corresponding cyclic acetal (XXVI), which is reduced with diisobutylaluminum hydride in toluene yielding 3-benzoyloxy-1-propanol (XXVII). The oxidation of (XXVII) with oxalyl chloride as before affords the corresponding aldehyde (XXVIII), which is submitted to a Wittig condensation with 2-(triphenylphosphoranylidene)acetic acid methyl ester (XXIX) giving (E)-5-benzyloxy-2-pentenoic acid methyl ester (XXX). The hydrolysis of (XXX) with NaOH in THF-water yields the corresponding acid (XXXI), which is condensed with pivaloyl chloride (XXXII) to afford the mixed anhydride (XXXIII). The condensation of (XXXIII) with 4(S)-benzyloxazolidin-2-one (XXXIV) by means of BuLi in THF gives 4(S)-benzyl-3-[5-benzyloxy-2(E)-pentenoyl]oxazolidin-2-one (XXXV), which is submitted to a Diels-Alder cycloaddition with cyclopentadiene (XXXVI) to yield 4-benzyl-3-[(3R,4R,5S,6S)-5-(2-benzyloxyethyl)bicyclo[2.2.1]hept-2-en-4-ylcarbonyl]oxazolidin-2-one (XXXVII). Hydrogenation of (XXXVII) with H2 over Pt in ethylacetate, followed by hydrolysis with H2O2 and LiOH affords (1R,2R,3S,4S)-3-(2-benzyloxyethyl)bicyclo[2.2.1]heptane-2-carboxylic acid (XXXVIII). The formation of the corresponding azide with ethyl chloroformate and sodium azide followed by degradation in refluxing toluene gives the amine (XXXIX), which is acylated with benzenesulfonyl chloride as before yielding the sulfonamide (XL). The deprotection of (XL) by hydrogenolysis with H2 over Pd/C in ethanol affords the substituted ethanol (XLI). Oxidation of (XLI) with oxalyl chloride as before gives the aldehyde (XLII), which is finally submitted to a Wittig condensation with 4-carboxybutyl triphenylphosphonium bromide and t-BuOK to yield acid (XIV) enantiomerically pure, already obtained.

1 Wong and F.F. Sun (Eds.), Raven Press, Ltd., New York 1989, 19, 659-62.
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) 14674 (Z)-7-[(1R,2S,3S,4S)-3-[(phenylsulfonyl)amino]bicyclo[2.2.1]hept-2-yl]-5-heptenoic acid C20H27NO4S 详情 详情
(XXV) 14685 1,3-propanediol; Trimethylene Glycol 504-63-2 C3H8O2 详情 详情
(XXVI) 14686 2-phenyl-1,3-dioxane C10H12O2 详情 详情
(XXVII) 14687 3-(benzyloxy)-1-propanol; 3-(Benzyloxy)propanol 4799-68-2 C10H14O2 详情 详情
(XXVIII) 14688 3-(benzyloxy)propanal C10H12O2 详情 详情
(XXIX) 14689 Methyl (triphenylphosphoranylidene)acetate; (methoxycarbonylmethylene)triphenylphosphorane;Methyl 2-(triphenyl-lambda(5)-phosphanylidene)acetate 2605-67-6 C21H19O2P 详情 详情
(XXX) 14690 Methyl (E)-5-(benzyloxy)-2-pentenoate C13H16O3 详情 详情
(XXXI) 14691 (E)-5-(Benzyloxy)-2-pentenoic acid C12H14O3 详情 详情
(XXXII) 13597 2,2-Dimethylpropanoyl chloride; Pivaloyl chloride 3282-30-2 C5H9ClO 详情 详情
(XXXIII) 14693 (E)-4-(Benzyloxy)-2-pentenoic 1,1-Dimethylpropionic anhydride C17H22O4 详情 详情
(XXXIV) 14694 (S)-4-Benzyl-2-oxazolidinone; (4S)-4-Benzyl-1,3-oxazolan-2-one; (S)-(-)-4-Benzyl-2-oxazolidinone 90719-32-7 C10H11NO2 详情 详情
(XXXV) 14695 (4S)-4-benzyl-3-[(E)-5-(benzyloxy)-2-pentenoyl]-1,3-oxazolan-2-one C22H23NO4 详情 详情
(XXXVI) 11183 1,3-Cyclopentadiene C5H6 详情 详情
(XXXVII) 14697 (4S)-4-benzyl-3-([(1R,2S,3S,4S)-3-[2-(benzyloxy)ethyl]bicyclo[2.2.1]hept-5-en-2-yl]carbonyl)-1,3-oxazolan-2-one C27H29NO4 详情 详情
(XXXVIII) 14698 (1S,2S,3S,4R)-3-[2-(benzyloxy)ethyl]bicyclo[2.2.1]heptane-2-carboxylic acid C17H22O3 详情 详情
(XXXIX) 14699 (1S,2S,3S,4R)-3-[2-(benzyloxy)ethyl]bicyclo[2.2.1]heptan-2-amine; (1S,2S,3S,4R)-3-[2-(benzyloxy)ethyl]bicyclo[2.2.1]hept-2-ylamine C16H23NO 详情 详情
(XL) 14700 N-[(1S,2S,3S,4R)-3-[2-(benzyloxy)ethyl]bicyclo[2.2.1]hept-2-yl]benzenesulfonamide C22H27NO3S 详情 详情
(XLI) 14701 N-[(1S,2S,3S,4R)-3-(2-hydroxyethyl)bicyclo[2.2.1]hept-2-yl]benzenesulfonamide C15H21NO3S 详情 详情
(XLII) 14673 N-[(1S,2S,3S,4R)-3-(2-oxoethyl)bicyclo[2.2.1]hept-2-yl]benzenesulfonamide C15H19NO3S 详情 详情
Extended Information