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Triethylamine → (2S,9S)-2-[(tert-Butoxycarbonyl)amino]-7-(carbobenzyloxy)-10-chloro-9-hydroxy-7-azadecanoic Acid tert-Butyl Ester

HRID 1068074
ノート
印刷プレビュー

反応式

HRID 1068074 の反応式
Cl[C:2]([O:4][CH2:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1)=[O:3].[C:12]([O:16][C:17](=[O:37])[C@@H:18]([NH:29][C:30]([O:32][C:33]([CH3:36])([CH3:35])[CH3:34])=[O:31])[CH2:19][CH2:20][CH2:21][CH2:22][NH:23][CH2:24][C@H:25]([OH:28])[CH2:26][Cl:27])([CH3:15])([CH3:14])[CH3:13].C(N(CC)CC)C>C(Cl)(Cl)Cl>[C:12]([O:16][C:17](=[O:37])[C@@H:18]([NH:29][C:30]([O:32][C:33]([CH3:36])([CH3:35])[CH3:34])=[O:31])[CH2:19][CH2:20][CH2:21][CH2:22][N:23]([C:2]([O:4][CH2:5][C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1)=[O:3])[CH2:24][C@H:25]([OH:28])[CH2:26][Cl:27])([CH3:15])([CH3:14])[CH3:13]
参加物実験手順後処理出典と根拠反応ノート

参加物

5

反応物 3

HCID 8471TriethylamineHCID 10387Benzyl chloroformateHCID 10810670(2S,9S)-2-[(tert-Butoxycarbonyl)amino]-10-chloro-9-hydroxy-7-azadecanoic Acid tert-Butyl Ester

生成物 1

HCID 10792289(2S,9S)-2-[(tert-Butoxycarbonyl)amino]-7-(carbobenzyloxy)-10-chloro-9-hydroxy-7-azadecanoic Acid tert-Butyl Ester収率 93.1%

試薬・触媒・溶媒 1

HCID 6212
Chloroform
溶媒
3 回

実験手順

A solution of benzyl chloroformate (1.21 g, 7.09 mmol) in chloroform (10 mL) was added over a period of 15 min to an ice-cold solution of 12a (2.16 g, 5.46 mmol) in chloroform (40 mL) under an Ar atmosphere. After dropwise addition of triethylamine (1.11 g, 11.0 mmol) in chloroform (10 mL), the reaction mixture was stirred for 4.5 hours at rt. The reaction mixture was extracted with 1 N HCl (60 mL) and water (60 mL), dried, and concentrated. The residue was purified by flash chromatography (33% ethyl acetate/hexane) to give 13a (2.69 g, 93%) as a colorless oil: 1H NMR 61.30-1.83 (m, 6H), 1.44 (s, 9H), 1.45 (s, 9H), 3.20-3.64 (m, 6H), 3.93 (dd, 1H, J=8.2; 5.5), 4.00 (m, 1H), 5.12 (s, 2H), 7.26-7.40 (m, 5H); 13C NMR δ 24.1, 28.3, 28.8, 32.5, 49.4, 51.4, 52.2, 55.7, 68.4, 71.0, 80.4, 82.5, 129.0, 129.1, 129.6, 138.0, 157.5-158.4 (br), 158.1, 173.7; HRMS m/z calcd for C26H42ClN2O7 529.2681, found 529.2694. Anal. calcd. for C26H41ClN2O7: C 59.03, H 7.81, N 5.29. Found: C 59.09, H 7.78, N 5.21. [α]23D−21.8° (c 1.00, CH3OH).

後処理

  1. extractionThe reaction mixture was extracted with 1 N HCl (60 mL) and water (60 mL)
  2. customdried
  3. concentrationconcentrated
  4. customThe residue was purified by flash chromatography (33% ethyl acetate/hexane)

出典と根拠

ORDレコード
ord-0c6b9ff0f5754d428b15d2428fa82a44
出典データセット
uspto-grants-2001_06
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US06248866B1

反応ノート

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