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【结 构 式】

【分子编号】32823

【品名】ethyl 2-[[(7S)-7-amino-5,6,7,8-tetrahydro-2-naphthalenyl]oxy]acetate

【CA登记号】

【 分 子 式 】C14H19NO3

【 分 子 量 】249.3098

【元素组成】C 67.45% H 7.68% N 5.62% O 19.25%

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:(IX)

The reaction of 7-methoxy-2-tetralone (I) with benzamide in refluxing toluene gives N-(7-methoxy-3,4-dihydronpahthalen-2-yl)benzamide (II), which is enantioselectively hydrogenated with H2 over a chiral Ru or Rh catalyst yielding the chiral benzamide (III). The hydrolysis of (III) with methanesulfonic acid in acetic acid at 160 C affords the chiral 7-methoxy-1,2,3,4-tetrahydronaphthalen-2(S)-amine (IV) , which is treated with 48% HBr affording 7-hydroxy-1,2,3,4-tetrahydronaphthalen-2(S)-ylamine (V). The protection of the amino group of (V) with Boc2O and triethylamine gives the carbamate (VI), which is condensed with ethyl 2-bromoacetate (VII) by means of K2CO3 yielding 2-[7(S)-(tert-butoxycarbonylamino)-5,6,7,8-tetrahydronaphthalen-2-yloxy]acetic acid ethyl ester (VIII). The deprotection of (VIII) with TFA affords 2-(7(S)-amino-5,6,7,8-tetrahydronaphthalen-2-yloxy]acetic acid ethyl ester (IX), which is finally condensed with the chiral 2(R)-(3-chlorophenyl)oxirane (X) in hot DMS. The chiral intermediate 7-methoxy-1,2,3,4-tetrahydronaphthalen-2(S)-amine (IV) can also by obtained by optical resolution of the racemic mixture (rac)-(IV) by means of (R)-(-)-mandelic acid.

1 Devocelle, M.; et al.; Alternative synthesis of the chiral atypical beta-adrenergic phenylethanolaminotetraline agonist SR58611A using enantioselective hydrogenation. Tetrahedron Lett 1999, 40, 24, 4551.
2 Cecchi, R.; et al.; Synthesis and beta-adrenergic activity of atypical beta-adrenergic phenylethanolaminotetralin stereoisomers. Eur J Med Chem 1994, 29, 4, 259.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
40592 Benzamide 55-21-0 C7H7NO 详情 详情
(rac)-(IV) 32818 7-methoxy-1,2,3,4-tetrahydro-2-naphthalenylamine; 7-methoxy-1,2,3,4-tetrahydro-2-naphthalenamine C11H15NO 详情 详情
(I) 24999 7-methoxy-3,4-dihydro-2(1H)-naphthalenone 4133-34-0 C11H12O2 详情 详情
(II) 32816 N-(7-methoxy-3,4-dihydro-2-naphthalenyl)benzamide C18H17NO2 详情 详情
(III) 32817 N-[(2S)-7-methoxy-1,2,3,4-tetrahydro-2-naphthalenyl]benzamide C18H19NO2 详情 详情
(IV) 32820 (2S)-7-methoxy-1,2,3,4-tetrahydro-2-naphthalenylamine; (2S)-7-methoxy-1,2,3,4-tetrahydro-2-naphthalenamine C11H15NO 详情 详情
(V) 32819 (7S)-7-amino-5,6,7,8-tetrahydro-2-naphthalenol C10H13NO 详情 详情
(VI) 32821 tert-butyl (2S)-7-hydroxy-1,2,3,4-tetrahydro-2-naphthalenylcarbamate C15H21NO3 详情 详情
(VII) 16640 Ethyl 2-bromoacetate; Ethyl bromoacetate 105-36-2 C4H7BrO2 详情 详情
(VIII) 32822 ethyl 2-([(7S)-7-[(tert-butoxycarbonyl)amino]-5,6,7,8-tetrahydro-2-naphthalenyl]oxy)acetate C19H27NO5 详情 详情
(IX) 32823 ethyl 2-[[(7S)-7-amino-5,6,7,8-tetrahydro-2-naphthalenyl]oxy]acetate C14H19NO3 详情 详情
(X) 15271 (R)-(+)-3-Chlorostyrene oxide; (2R)-2-(3-Chlorophenyl)oxirane 62600-71-9 C8H7ClO 详情 详情
Extended Information