Benzyl Alcohol → Tert-butyl (2-(benzyloxy)-5-nitrophenyl)carbamate

HRID 2274269노트

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HRID 2274269 반응식
N#N.[OH:3][C:4]1[CH:9]=[CH:8][C:7]([N+:10]([O-:12])=[O:11])=[CH:6][C:5]=1[NH:13][C:14](=[O:20])[O:15][C:16]([CH3:19])([CH3:18])[CH3:17].[CH2:21](O)[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C(Cl)Cl.O.CCCCCC.C(OCC)(=O)C>[CH2:21]([O:3][C:4]1[CH:9]=[CH:8][C:7]([N+:10]([O-:12])=[O:11])=[CH:6][C:5]=1[NH:13][C:14](=[O:20])[O:15][C:16]([CH3:17])([CH3:19])[CH3:18])[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1

참가 물질

9

반응물 5

HCID 244Benzyl AlcoholHCID 947NitrogenHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 15252120Tert-butyl 2-hydroxy-5-nitrophenylcarbamate

생성물 1

HCID 86724342Tert-butyl (2-(benzyloxy)-5-nitrophenyl)carbamate

시약·촉매·용매 3

HCID 962Water용매HCID 6344Dichloromethane용매2회HCID 21226206Ethyl acetate hexane용매

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온도
0 °C

실험 절차

In a 50 mL 3-neck RBF equipped with N2-bubbler and thermo pocket, tert-butyl (2-hydroxy-5-nitrophenyl)carbamate (2.0 g), benzyl alcohol (1.02 g) and triphenyl phosphine (2.48 g) were taken in 10 mL DCM. The reaction mixture was cooled to 0° C. Diethyl azodicarboxylate (1.65 g) was dissolved in 10 mL DCM was added dropwise in the reaction. The reaction mixture was stirred at room temperature for 24 h. The reaction mixture was monitored on TLC using hexane:ethyl acetate (6:4) as mobile phase. After completion, the reaction was poured into water and extracted with DCM (3×50 mL). The DCM layer was washed with brine solution, dried over sodium sulfate and concentrated under reduced pressure at 40° C. Purification was carried out by column chromatography. Desired product eluted with 5% ethyl acetate in hexane to give, after concentration, 1.03 g of tert-butyl (2-(benzyloxy)-5-nitrophenyl)carbamate. 1H NMR: DMSO-d6 (400 MHz) 1.48 (s, 9H), 5.34 (s, 2H), 7.26 (d, 1H, J=9.2), 7.35 (m, 1H), 7.41 (m, 2H), 7.54 (d, 2H, J=6.8), 7.95 (dd, 1H, J=2.8, 9.2), 8.51 (s, 1H), 8.64 (d, 1H, J=2.8).

후처리

  1. additionwas added dropwise in the reaction
  2. extractionextracted with DCM (3×50 mL)
  3. washThe DCM layer was washed with brine solution
  4. dry with materialdried over sodium sulfate
  5. concentrationconcentrated under reduced pressure at 40° C
  6. customPurification
  7. washDesired product eluted with 5% ethyl acetate in hexane
  8. customto give
  9. concentrationafter concentration, 1.03 g of tert-butyl (2-(benzyloxy)-5-nitrophenyl)carbamate

출처 및 근거

ORD 기록
ord-3869b05b42014160a78281deebd9d54a
출처 데이터셋
uspto-grants-2015_09
특허 번호
US09126950B2

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