• English
  • 简体中文
Login Register
Current Location: Home > Feedback Help Print

【结 构 式】

【分子编号】21394

【品名】1-chloro-2-methoxybenzene

【CA登记号】766-51-8

【 分 子 式 】C7H7ClO

【 分 子 量 】142.58468

【元素组成】C 58.97% H 4.95% Cl 24.86% O 11.22%

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:(IV)

3) The acylation of D-aspartic acid (I) with methyl chloroformate and NaOH in water yields N-(methoxycarbonyl)-D-aspartic acid (II), which is anhydrized with oxalyl chloride and DMF in isopropyl acetate giving the corresponding anhydride (III). The Friedel-Craft's condensation of (III) with 2-chloroanisole (IV) by means of AlCl3 in nitromethane - dichloromethane affords 3-(3-chloro-4-methoxybenzoyl)-N-(methoxycarbonyl)-D-alanine (V), which is reduced with H2 over Pd/C in aqueous acetic acid to the substituted amino acid (VI). The reaction of (VI) with PCl5 or oxalyl chloride yields the corresponding acyl chloride (VII), which is cyclized by means of FeCl3 in nitromethane-dichloromethane affording 7-methoxy-2(R)-(methoxycarbonylamino)-1-tetralone (VIII). The reduction of (VIII) with sodium bis(methoxyethoxy) aluminum hydride (BMAlH) in toluene gives the trans-aminoalcohol (IX), which is deprotected by treatment with NaOH in methanol - water yielding (2R-trans)-2-amino-1-hydroxy-7-methoxytetraline (X). The acylation of (X) with propionyl anhydride in methanol - water affords the amide (XI), which is reduced with BH3-dimethyl sulfide giving [2(R)-trans]-1-hydroxy-7-methoxy-2-(propylamino)tetraline (XII). The acylation of (XII) with chloroacetyl chloride in toluene - aqueous Na2CO3 affords the chloroacetamide (XIII), which is cyclized by means of NaOH and tetrabutylammonium chloride to give [4a(R)-trans]-9-methoxy-4-propyl-3,4,4a,5,6,10b-hexahydro-2H-naphth [1,2-b]-1,4-oxazin-3-one (XIV). The reduction of (XIV) with BMAlH as before gives the methylated product (XV), which is finally demethylated with BBr3 and cyclohexene in dichloromethane.

1 Melillo, D.G.; Mathre, D.J.; Larsen, R.D. (Merck & Co., Inc.); Chiral synthesis of (+)-trans-1a,2,3,4a,5,6-hexahydro-9-hydroxy-4-propyl-4H-naphth(1,2-b)- 1,4-oxazine. EP 0251547 .
2 Prous, J.; Castaner, J.; NAXAGOLIDE HYDROCHLORIDE < Prop INNM; USAN >. Drugs Fut 1989, 14, 10, 951.
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) 21391 D-aspartic acid; (2R)-2-aminobutanedioic acid 1783-96-6 C4H7NO4 详情 详情
(II) 21392 (2R)-2-[(methoxycarbonyl)amino]butanedioic acid C6H9NO6 详情 详情
(III) 21393 methyl (3R)-2,5-dioxotetrahydro-3-furanylcarbamate C6H7NO5 详情 详情
(IV) 21394 1-chloro-2-methoxybenzene 766-51-8 C7H7ClO 详情 详情
(V) 21395 (2R)-4-(3-chloro-4-methoxyphenyl)-2-[(methoxycarbonyl)amino]-4-oxobutyric acid C13H14ClNO6 详情 详情
(VI) 21396 (2R)-2-[(methoxycarbonyl)amino]-4-(4-methoxyphenyl)butyric acid C13H17NO5 详情 详情
(VII) 21397 methyl (1R)-1-(chlorocarbonyl)-3-(4-methoxyphenyl)propylcarbamate C13H16ClNO4 详情 详情
(VIII) 21398 methyl (2R)-7-methoxy-1-oxo-1,2,3,4-tetrahydro-2-naphthalenylcarbamate C13H15NO4 详情 详情
(IX) 21399 methyl (1R,2R)-1-hydroxy-7-methoxy-1,2,3,4-tetrahydro-2-naphthalenylcarbamate C13H17NO4 详情 详情
(X) 21400 (1R,2R)-2-amino-7-methoxy-1,2,3,4-tetrahydro-1-naphthalenol C11H15NO2 详情 详情
(XI) 21388 N-[(1R,2R)-1-hydroxy-7-methoxy-1,2,3,4-tetrahydro-2-naphthalenyl]propanamide C14H19NO3 详情 详情
(XII) 21389 (1R,2R)-7-methoxy-2-(propylamino)-1,2,3,4-tetrahydro-1-naphthalenol C14H21NO2 详情 详情
(XIII) 21403 2-chloro-N-[(1R,2R)-1-hydroxy-7-methoxy-1,2,3,4-tetrahydro-2-naphthalenyl]-N-propylacetamide C16H22ClNO3 详情 详情
(XIV) 21390 (4aR,10bR)-9-methoxy-4-propyl-4a,5,6,10b-tetrahydro-2H-naphtho[1,2-b][1,4]oxazin-3(4H)-one C16H21NO3 详情 详情
(XV) 21381 (4aR,10bR)-4-propyl-3,4,4a,5,6,10b-hexahydro-2H-naphtho[1,2-b][1,4]oxazin-9-yl methyl ether C16H23NO2 详情 详情
(C) 11296 2-Chloroacetyl chloride; Chloroacetic chloride 79-04-9 C2H2Cl2O 详情 详情
Extended Information