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Tert-butyl cyclopent-2-en-1-yl carbonate → HCID 117974230、化合物

HRID 708991
ノート
印刷プレビュー

反応式

HRID 708991 の反応式
[C:1]([O:5][C:6]([N:8]([C@H:16]1[CH2:24][O:23][CH2:22][C@H:21]([CH2:25][C:26]2[C:35]3[C:30](=[CH:31][CH:32]=[CH:33][CH:34]=3)[CH:29]=[CH:28][CH:27]=2)[C@@H:20]([OH:36])[C@H:19]([CH3:37])[O:18][C:17]1=[O:38])[C:9](=[O:15])[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:7])([CH3:4])([CH3:3])[CH3:2].C(=O)(O[CH:46]1[CH2:50][CH2:49][CH:48]=[CH:47]1)OC(C)(C)C>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.[Fe+2]>[C:11]([O:10][C:9]([N:8]([C@H:16]1[CH2:24][O:23][CH2:22][C@H:21]([CH2:25][C:26]2[C:35]3[C:30](=[CH:31][CH:32]=[CH:33][CH:34]=3)[CH:29]=[CH:28][CH:27]=2)[C@@H:20]([O:36][CH:50]2[CH2:49][CH2:48][CH:47]=[CH:46]2)[C@H:19]([CH3:37])[O:18][C:17]1=[O:38])[C:6](=[O:7])[O:5][C:1]([CH3:2])([CH3:3])[CH3:4])=[O:15])([CH3:13])([CH3:14])[CH3:12]
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

6

反応物 2

HCID 11469477Tert-butyl cyclopent-2-en-1-yl carbonateHCID 117974424tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-8-hydroxy-9-methyl-7-(1-naphthylmethyl)-2-oxo-1,5-dioxonan-3-yl]carbamate

生成物 1

HCID 117974230HCID 117974230、化合物収率 89%

試薬・触媒・溶媒 3

HCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)触媒
HCID 9811564
Bis(dibenzylideneacetone)palladium
触媒
HCID 1140Toluene溶媒

反応条件

温度
95 °C

実験手順

To a solution of tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-8-hydroxy-9-methyl-7-(1-naphthylmethyl)-2-oxo-1,5-dioxonan-3-yl]carbamate (205 mg, 0.387 mmol), [Pd2(dba)3] (26.6 mg, 0.029 mmol), and dppf (32.5 mg, 0.058 mmol) in toluene (1.94 mL) was added (E) tert-butyl cyclopent-2-en-1-yl carbonate (250 mg, 1.355 mmol), and the mixture was warmed to 95° C. and stirred for 2 h. An additional portion of (E)-tert-butyl pent-2-en-1-yl carbonate (150 mg, 0.6 equiv.) was added to the reaction and stirring continued for an additional 2 h. The mixture was cooled to room temperature and the toluene was removed under reduced pressure. The residue was dissolved in CH2Cl2 (12 mL), adsorbed to Celite® and purified by flash chromatography (SiO2, 35 mL/min, 0→25 EtOAc/hexanes) to provide tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-8-cyclopent-2-en-1-yloxy-9-methyl-7-(1-naphthylmethyl)-2-oxo-1,5-dioxonan-3-yl]carbamate (205 mg, 89%) as a mixture of diastereomers (about 1:1) in the form of a white solid: IR (thin film) 2928, 1755, 1709, 1117 cm−1; 1H NMR (400 MHz, CDCl3) δ 8.09 (m, 1H), 7.82 (m, 1H), 7.74-7.66 (m, 1H), 7.53-7.39 (m, 2H), 7.42-7.28 (m, 2H), 6.13-6.01 (m, 1.5H), 6.01-5.92 (m, 0.5H), 5.07 (app t, J=7.7 Hz, 1H), 4.90-4.79 (m, 2H), 4.02-3.83 (m, 2H), 3.76 (dd, J=13.6, 2.8 Hz, 1H), 3.55-3.39 (m, 3H), 2.82-2.66 (m, 1H), 2.60-2.47 (m, 1H), 2.34-2.17 (m, 2H), 2.11-1.92 (m, 3H), 1.57 (app dd, J=12.6, 6.4 Hz, 3H), 1.39 (app d, J=5.9 Hz, 18H); ESIMS m/z 618 ([M+Na]+).

後処理

  1. stirringstirring
  2. waitcontinued for an additional 2 h
  3. temperatureThe mixture was cooled to room temperature
  4. customthe toluene was removed under reduced pressure
  5. dissolutionThe residue was dissolved in CH2Cl2 (12 mL)
  6. custompurified by flash chromatography (SiO2, 35 mL/min, 0→25 EtOAc/hexanes)

出典と根拠

ORDレコード
ord-148dc02fd81a48849ae4c16bc6340f97
出典データセット
uspto-grants-2015_11
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09179674B2

反応ノート

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