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Hydrochloric Acid → (2R,4R)-1-(tert-butoxycarbonyl)-4-(2,3-dihydrobenzo[b][1,4]dioxine-6-carboxamido)piperidine-2-carboxylic Acid

HRID 1971300
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HRID 1971300 반응식
[Li+].[OH-].[O:3]1[CH2:8][CH2:7][O:6][C:5]2[CH:9]=[C:10]([C:13]([NH:15][C@@H:16]3[CH2:21][CH2:20][N:19]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[C@@H:18]([C:29]([O:31]C)=[O:30])[CH2:17]3)=[O:14])[CH:11]=[CH:12][C:4]1=2.Cl>C1COCC1.CO.O>[C:25]([O:24][C:22]([N:19]1[CH2:20][CH2:21][C@@H:16]([NH:15][C:13]([C:10]2[CH:11]=[CH:12][C:4]3[O:3][CH2:8][CH2:7][O:6][C:5]=3[CH:9]=2)=[O:14])[CH2:17][C@@H:18]1[C:29]([OH:31])=[O:30])=[O:23])([CH3:28])([CH3:26])[CH3:27]
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참가 물질

5

반응물 3

HCID 313Hydrochloric AcidHCID 3939Lithium HydroxideHCID 67266415(2R,4R)-1-tert-butyl 2-methyl 4-(2,3-dihydrobenzo[b][1,4]dioxine-6-carboxamido)piperidine-1,2-dicarboxylate

생성물 1

HCID 67266312(2R,4R)-1-(tert-butoxycarbonyl)-4-(2,3-dihydrobenzo[b][1,4]dioxine-6-carboxamido)piperidine-2-carboxylic Acid수율 96.1%

시약·촉매·용매 1

HCID 21892291
Methanol tetrahydrofuran water
용매

실험 절차

LiOH (1.23 g, 51.4 mmol) was added to a solution of (2R,4R)-1-tert-butyl 2-methyl 4-(2,3-dihydrobenzo[b][1,4]dioxine-6-carboxamido)piperidine-1,2-dicarboxylate (5.4 g, 12.8 mmol) in THF/MeOH/water (3:2:1) (60 mL) and the resulting solution was stirred at room temperature for 18 hours. 1M HCl solution was added to reaction solution to adjust pH to about 3, extracted with ethyl acetate (2×100 mL). The organic layers were dried over MgSO4 and concentrated to give the acid as a white solid 5.0 g (96%). LC-MS: 407.3; 405.3 (t=2.2 min).

후처리

  1. extractionextracted with ethyl acetate (2×100 mL)
  2. dry with materialThe organic layers were dried over MgSO4
  3. concentrationconcentrated

출처 및 근거

ORD 기록
ord-54462bc9e8e3407c805dfa76bfa0164d
출처 데이터셋
uspto-grants-2013_04
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08431597B2

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