Dichloromethane → tert-butyl (8S,9aR)-8-hydroxy-5-oxohexahydro-1H-pyrrolo[1,2-a][1,4]diazepine-2(3H)-carboxylate

HRID 572040ノート

反応式

HRID 572040 の反応式
[N+](C1C=CC(C([O:10][C@@H:11]2[CH2:28][N:14]3[C:15](=[O:27])[CH2:16][CH2:17][N:18]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:19][C@H:13]3[CH2:12]2)=O)=CC=1)([O-])=O.C(=O)([O-])[O-].[K+].[K+].ClCCl>CO>[OH:10][C@@H:11]1[CH2:28][N:14]2[C:15](=[O:27])[CH2:16][CH2:17][N:18]([C:20]([O:22][C:23]([CH3:24])([CH3:25])[CH3:26])=[O:21])[CH2:19][C@H:13]2[CH2:12]1

参加物

5

反応物 3

HCID 6344DichloromethaneHCID 11430Potassium CarbonateHCID 86723191tert-butyl (8S,9aR)-8-[(4-nitrobenzoyl)oxy]-5-oxohexahydro-1H-pyrrolo[1,2-a][1,4]diazepine-2(3H)-carboxylate

生成物 1

HCID 86723192tert-butyl (8S,9aR)-8-hydroxy-5-oxohexahydro-1H-pyrrolo[1,2-a][1,4]diazepine-2(3H)-carboxylate収率 64.6%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

tert-Butyl (8S,9aR)-8-[(4-nitrobenzoyl)oxy]-5-oxohexahydro-1H-pyrrolo[1,2-a][1,4]diazepine-2(3H)-carboxylate (156 mg, 0.372 mmol, 1.0 equivalent, Part E) was dissolved in methanol (3 mL). Potassium carbonate (20 mg, 0.145 mmol, 0.39 equivalent) was added and stirring was continued at room temperature for 30 minutes. The solvent was removed in vacuo, and the crude material was loaded onto a 12-g silica column with dichloromethane and eluted with 0-5% methanol:dichloromethane over 15 minutes, held at 5% methanol:dichloromethane for five minutes, then eluted with 10% methanol:dichloromethane for 10 minutes to afford the titled compound (65 mg, 0.240 mmol, 64.6% yield over two steps) as a white solid. 1H NMR (300 MHz, CDCl3) δ ppm 4.44 (t, J=3.7 Hz, 1H), 4.39-3.86 (m, J=79.8 Hz, 2H), 4.06 (dt, J=17.5, 8.9 Hz, 1H), 3.83 (dd, J=13.2, 2.3 Hz, 1H), 3.51 (dd, J=13.2, 3.7 Hz, 1H), 3.35-2.96 (br s, 1H), 2.74-2.46 (m, 3H), 2.24 (dd, J=13.2, 6.0 Hz, 1H), 1.74 (ddd, J=12.0, 9.0, 3.0 Hz, 1H), 1.48 (s, 9H); MS (ESI+) m/z 270.9 (M+H)+.

後処理

  1. customThe solvent was removed in vacuo
  2. washeluted with 0-5% methanol
  3. waitdichloromethane over 15 minutes
  4. waitdichloromethane for five minutes
  5. washeluted with 10% methanol

出典と根拠

ORDレコード
ord-ec2c16a443fa4e3eb37f6b810fd609c3
出典データセット
uspto-grants-2015_05
特許番号
US09029361B2

反応ノート

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