Carbonic acid sodium salt (1:2) → (S)-2-tert-Butoxycarbonylamino-3-{(S)-2-[4-(3,4-dichloro-benzyloxy)-phenyl]-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl}-propionic acid methyl ester

HRID 13572

反应方程式

HRID 13572 反应方程式
[CH3:1][O:2][C:3](=[O:24])[C@@H:4]([NH:16][C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:5][C:6]1[CH:11]=[CH:10][C:9]([OH:12])=[C:8]([N+:13]([O-])=O)[CH:7]=1.C[O:26][C:27](=O)[C@@H:28]([C:30]1[CH:35]=[CH:34][C:33]([O:36][CH2:37][C:38]2[CH:43]=[CH:42][C:41]([Cl:44])=[C:40]([Cl:45])[CH:39]=2)=[CH:32][CH:31]=1)O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C.C(=O)([O-])[O-].[Na+].[Na+]>C(Cl)Cl.[Fe].CCOC(C)=O>[CH3:1][O:2][C:3](=[O:24])[C@@H:4]([NH:16][C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:5][C:6]1[CH:11]=[CH:10][C:9]2[O:12][C@@H:28]([C:30]3[CH:31]=[CH:32][C:33]([O:36][CH2:37][C:38]4[CH:43]=[CH:42][C:41]([Cl:44])=[C:40]([Cl:45])[CH:39]=4)=[CH:34][CH:35]=3)[C:27](=[O:26])[NH:13][C:8]=2[CH:7]=1

参与物

9

反应物 5

HCID 10340Carbonic acid sodium salt (1:2)HCID 11776三苯基膦HCID 5363146偶氮二甲酸二异丙酯HCID 15518593(S)-2-tert-Butoxycarbonylamino-3-(4-hydroxy-3-nitro-phenyl)-propionic acid methyl esterHCID 24965837Methyl (R)-2-(4-((3,4-dichlorobenzyl)oxy)phenyl)-2-hydroxyacetate

产物 1

HCID 66922588(S)-2-tert-Butoxycarbonylamino-3-{(S)-2-[4-(3,4-dichloro-benzyloxy)-phenyl]-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl}-propionic acid methyl ester收率 56.4%

试剂、催化剂与溶剂 3

HCID 23925Stainless steel, powder, -150 mesh催化剂HCID 6344二氯甲烷溶剂HCID 8857乙酸乙酯溶剂

反应条件

温度
-20 °C

实验过程

(S)-2-tert-Butoxycarbonylamino-3-(4-hydroxy-3-nitro-phenyl)-propionic acid methyl ester (16.8 mmol) and (R)-[4-(3,4-dichloro-benzyloxy)-phenyl]-hydroxy-acetic acid methyl ester (20.1 mmol) were dissolved in 80 mL of DCM, resin-bound triphenylphosphine (33.6 mmol) added and the mixture cooled to −20° C. To this solution was added DIAD (25.2 mmol) and the mixture was agitated for 30 min at −20° C. The mixture was slowly allowed to warm to r.t. and agitated for 1.5 h. The reaction mixture was filtered and concentrated. The resulting residue was dissolved in glacial acetic acid (60 mL) and heated to 100° C. Iron powder (336 mmol) was added and the resulting mixture heated at 100° C. for 1 h. The mixture was poured onto water and EtOAc. The mixture was brought to ˜pH 7 with sodium carbonate. The organic layer was dried over sodium sulfate and concentrated. The residue was treated with diethyl ether and the resulting solid filtered and washed with diethyl ether to provide (S)-2-tert-Butoxycarbonylamino-3-{(S)-2-[4-(3,4-dichloro-benzyloxy)-phenyl]-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl}-propionic acid methyl ester (5.7 g). LC-MS (m/z) 502 (M-Boc).

后处理

  1. temperatureto warm to r.t.
  2. stirringagitated for 1.5 h
  3. filtrationThe reaction mixture was filtered
  4. concentrationconcentrated
  5. dissolutionThe resulting residue was dissolved in glacial acetic acid (60 mL)
  6. temperatureheated to 100° C
  7. temperaturethe resulting mixture heated at 100° C. for 1 h
  8. dry with materialThe organic layer was dried over sodium sulfate
  9. concentrationconcentrated
  10. additionThe residue was treated with diethyl ether
  11. filtrationthe resulting solid filtered
  12. washwashed with diethyl ether

来源与证据

ORD记录
ord-42d126080e554dc4bcd910ea6e15d523
来源数据集
uspto-grants-2010_06
专利号
US07727983B2

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