Triethylamine → (4R,5S)-4-Methyl-3-((R)-4-methyl-heptanoyl)-5-phenyl-oxazolidin-2-one

HRID 28428ノート

反応式

HRID 28428 の反応式
[CH3:1][C@H:2]([CH2:8][CH2:9][CH3:10])[CH2:3][CH2:4][C:5]([OH:7])=O.C(N(CC)CC)C.CC(C)(C)C(Cl)=O.[Li+].[Cl-].[CH3:27][C@@H:28]1[C@H:32]([C:33]2[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=2)[O:31][C:30](=[O:39])[NH:29]1>C1COCC1>[CH3:27][C@@H:28]1[C@H:32]([C:33]2[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=2)[O:31][C:30](=[O:39])[N:29]1[C:5](=[O:7])[CH2:4][CH2:3][C@H:2]([CH3:1])[CH2:8][CH2:9][CH3:10]

参加物

7

反応物 5

HCID 8471TriethylamineHCID 62493Pivaloyl chlorideHCID 433294Lithium ChlorideHCID 2733812(4R,5S)-(+)-4-Methyl-5-phenyl-2-oxazolidinoneHCID 138003704-Methylheptanoic acid, (-)-

生成物 1

HCID 57160957(4R,5S)-4-Methyl-3-((R)-4-methyl-heptanoyl)-5-phenyl-oxazolidin-2-one

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

To (R)-4-methyl-heptanoic acid (19 g, 0.132 mol) and triethylamine (49.9 g, 0.494 mol) in THF (500 mL) at 0° C. was added trimethylacetylchloride (20 g, 0.17 mol). After 1 hour LiCl (7.1 g, 0.17 mol) was added followed by (4R,5S)-(+)-4-methyl-5-phenyl-2-oxazolidinone) 3 (30 g, 0.17 mol). The mixture was warmed to room temperature and after 16 hours the filtrate was removed by filtration and the solution concentrated under reduced pressure. Flash chromatography (7:1 hexane/EtOAc) gave (4R,5S)-4-methyl-3-((R)-4-methyl-heptanoyl)-5-phenyl-oxazolidin-2-one as an oil. 31.5 g; 79%. [a]D=+5.5 (c 1 in CHCl3). MS, m/z (relative intensity): 304 [M+H, 100%].

後処理

  1. customwas removed by filtration
  2. concentrationthe solution concentrated under reduced pressure

出典と根拠

ORDレコード
ord-618a4a3542234e029cb50fd22681dc1f
出典データセット
uspto-grants-2008_09
特許番号
US07419981B2

反応ノート

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