Ethylparaben → Ethyl 4-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthoyloxy)benzoate

HRID 484357

반응식

HRID 484357 반응식
[CH3:1][C:2]1([CH3:17])[CH2:11][CH2:10][C:9]([CH3:13])([CH3:12])[C:8]2[CH:7]=[C:6]([C:14]([OH:16])=[O:15])[CH:5]=[CH:4][C:3]1=2.O[C:19]1[CH:29]=[CH:28][C:22]([C:23]([O:25][CH2:26][CH3:27])=[O:24])=[CH:21][CH:20]=1.C1(N=C=NC2CCCCC2)CCCCC1>CN(C)C1C=CN=CC=1.C(Cl)Cl>[CH3:1][C:2]1([CH3:17])[CH2:11][CH2:10][C:9]([CH3:12])([CH3:13])[C:8]2[CH:7]=[C:6]([C:14]([O:16][C:19]3[CH:29]=[CH:28][C:22]([C:23]([O:25][CH2:26][CH3:27])=[O:24])=[CH:21][CH:20]=3)=[O:15])[CH:5]=[CH:4][C:3]1=2

참가 물질

6

반응물 3

HCID 8434EthylparabenHCID 10868DicyclohexylcarbodiimideHCID 2276385,5,8,8-Tetramethyl-5,6,7,8-tetrahydronaphthalene-2-carboxylic acid

생성물 1

HCID 19748015Ethyl 4-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthoyloxy)benzoate

시약·촉매·용매 2

HCID 142844-(Dimethylamino)pyridine촉매HCID 6344Dichloromethane용매

실험 절차

A solution of 116 mg (0.5 mmol) of 5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-2-naphthoic acid, 58 mg (0.5 mmol) of ethyl 4-hydroxybenzoate, 117 mg (0.56 mmol) of 1,3-dicyclohexylcarbodiimide and 30 mg (0.25 mmol) of 4-dimethylaminopyridine in 15 ml of methylene chloride was stirred at room temperature for 12 hours. The reaction mixture was then filtered and the filtrate concentrated in-vacuo. The resultant residue was purified by flash chromatography (silica; 5% ethyl acetate in hexanes) to give the title compound as white crystals. PMR (CDCl3): δ 1.32 (6H, s), 1.36 (6H, s), 1.42 (3H, t, J~7.0 Hz), 1.73 (4H, s), 4.40 (2H, q, J~7.0 Hz), 7.28 (2H, d, J~8.1 Hz), 7.45 (1H, d, J~8.8 Hz), 7.93 (1H, dd, J~8.8 Hz, 1.8 Hz), 8.13 (2H, d, J~8.1 Hz), 8.14 (1H, s).

후처리

  1. filtrationThe reaction mixture was then filtered
  2. concentrationthe filtrate concentrated in-vacuo
  3. customThe resultant residue was purified by flash chromatography (silica; 5% ethyl acetate in hexanes)

출처 및 근거

ORD 기록
ord-0af8ec32ede14ba190806974841680ca
출처 데이터셋
uspto-grants-1993_07
특허 번호
US05231113

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