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

【结 构 式】

【分子编号】28124

【品名】[(2S)-2-[(benzyloxy)methyl]-3-methylbutyl](bromo)magnesium

【CA登记号】

【 分 子 式 】C13H19BrMgO

【 分 子 量 】295.50226

【元素组成】C 52.84% H 6.48% Br 27.04% Mg 8.22% O 5.41%

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:(XIII)

Alkylation of 3-hydroxy-4-methoxybenzyl alcohol (I) with 1-bromo-3-methoxypropane (II) gives ether (III). Subsequent conversion of benzyl alcohol (III) into bromide (IV) is carried out using bromotrimetylsilane. The chiral isovaleryloxazolidinone (V) is alkylated with bromide (IV) by means of LiHMDS to afford (VI), which is hydrolyzed to the (S)-2-aryl-2-isopropylpropionic acid (VII) by means of lithium peroxide. The reduction of acid (VII) to the corresponding alcohol with NaBH4/I2 reagent, followed by treatment with PPh3 and NBS, provides bromide (VIII). Alkylation of the chiral dimethoxydihydropyrazin (IX) with bromide (VIII) produces (X). Further hydrolysis of the pyrazine ring of (X) with HCl, followed by Boc protection of the resulting (S,S)-amino ester, yields compound (XI). Reduction of the ester group of (XI) with DIBAL gives aldehyde (XII). This compound is condensed with the Grignard reagent (XIII) to afford the diastereomeric mixture of amino alcohols (XIV). Treatment of mixture (XIV) with 2,2-dimethoxypropane (XV) and TsOH produces a mixture of oxazolidines, from which the required (S,S,S)-isomer (XVI) is isolated by flash chromatography. Hydrogenolitic deprotection of the benzyl ether of (XVI) gives alcohol (XVII).

1 Mealy, N.E.; Castañer, R.M.; Silvestre, J.S.; Castañer, J.; Aliskiren Fumarate. Drugs Fut 2001, 26, 12, 1139.
2 Rigollier, P.; Stutz, S.; Goeschke, R.; Yamaguchi, Y.; Maibaum, J.; Wood, J.; Structural modification of the P2' position of 2,7-dialkyl substituted 5(S)-amino-4(S)-hydroxy-8-phenyl-octane-carboxamides: Discovery of a potent non-peptide renin inhibitor active after once daily dosing in marmosets. 15th European Federation for Medicinal Chemistry International Symposium on Medicinal Chemistry (Sept 6 1998, Edinburgh) 1998, Abst P.230.
3 Göschke, R.; Maibaum, J.K.; Schilling, W.; Stutz, S.; Rigollier, P.; Yamaguchi, Y.; Cohen, N.C.; Herold, P. (Novartis AG); Delta-amino-gamma-hydroxy-omega-aryl alkanoic acid amides with enzyme especially renin inhibiting activities. EP 0678500; EP 0678503; JP 1996053434; JP 1996081430; US 5559111; US 5627182; US 5646143 .
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) 28115 5-(hydroxymethyl)-2-methoxyphenol 4383-06-6 C8H10O3 详情 详情
(II) 17319 1-bromo-3-methoxypropane; 3-bromopropyl methyl ether C4H9BrO 详情 详情
(III) 28116 [4-methoxy-3-(3-methoxypropoxy)phenyl]methanol 172900-74-2 C12H18O4 详情 详情
(IV) 28117 3-[5-(bromomethyl)-2-methoxyphenoxy]propyl methyl ether 172900-73-1 C12H17BrO3 详情 详情
(V) 28131 (4S)-4-benzyl-3-(3-methylbutanoyl)-1,3-oxazolidin-2-one C15H19NO3 详情 详情
(VI) 28118 (4S)-4-benzyl-3-[(2R)-2-[4-methoxy-3-(3-methoxypropoxy)benzyl]-3-methylbutanoyl]-1,3-oxazolidin-2-one C27H35NO6 详情 详情
(VII) 28119 (2R)-2-[4-methoxy-3-(3-methoxypropoxy)benzyl]-3-methylbutyric acid C17H26O5 详情 详情
(VIII) 28120 3-[5-[(2R)-2-(bromomethyl)-3-methylbutyl]-2-methoxyphenoxy]propyl methyl ether 172900-69-5 C17H27BrO3 详情 详情
(IX) 10296 (R)-2,5-Dihydro-3,6-dimethoxy-2-isopropylpyrazine; (3R)-3-Isopropyl-5-methoxy-3,6-dihydro-2-pyrazinyl methyl ether; (2R)-2-Isopropyl-3,6-dimethoxy-2,5-dihydropyrazine 109838-85-9 C9H16N2O2 详情 详情
(X) 28121 (2R,5S)-2-isopropyl-3,6-dimethoxy-5-[(2S)-2-[4-methoxy-3-(3-methoxypropoxy)benzyl]-3-methylbutyl]-2,5-dihydropyrazine C26H42N2O5 详情 详情
(XI) 28122 methyl (2S,4S)-2-[(tert-butoxycarbonyl)amino]-4-[4-methoxy-3-(3-methoxypropoxy)benzyl]-5-methylhexanoate C25H41NO7 详情 详情
(XII) 28123 tert-butyl (1S,3S)-1-formyl-3-[4-methoxy-3-(3-methoxypropoxy)benzyl]-4-methylpentylcarbamate C24H39NO6 详情 详情
(XIII) 28124 [(2S)-2-[(benzyloxy)methyl]-3-methylbutyl](bromo)magnesium C13H19BrMgO 详情 详情
(XIV) 28125 tert-butyl (1S,4S)-4-[(benzyloxy)methyl]-2-hydroxy-1-[(2S)-2-[4-methoxy-3-(3-methoxypropoxy)benzyl]-3-methylbutyl]-5-methylhexylcarbamate C37H59NO7 详情 详情
(XV) 10722 1-Methoxy-1-methylethyl methyl ether; 2,2-Dimethoxypropane 77-76-9 C5H12O2 详情 详情
(XVI) 28126 tert-butyl (4S,5S)-5-[(2S)-2-[(benzyloxy)methyl]-3-methylbutyl]-4-[(2S)-2-[4-methoxy-3-(3-methoxypropoxy)benzyl]-3-methylbutyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate C40H63NO7 详情 详情
(XVII) 28127 tert-butyl (4S,5S)-5-[(2S)-2-(hydroxymethyl)-3-methylbutyl]-4-[(2S)-2-[4-methoxy-3-(3-methoxypropoxy)benzyl]-3-methylbutyl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate C33H57NO7 详情 详情
Extended Information