1,2-Dichloroethane → (S)-2-tert-Butoxycarbonylamino-pentanedioic acid 5-benzyl ester 1-cyclopentyl ester

HRID 425017

반응식

HRID 425017 반응식
[NH:1]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[C@H:2]([C:15]([OH:17])=[O:16])[CH2:3][CH2:4][C:5](=[O:14])[O:6][CH2:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.[CH:25]1(O)[CH2:29][CH2:28][CH2:27][CH2:26]1.C(Cl)CCl>ClCCl.CN(C1C=CN=CC=1)C>[CH:25]1([O:16][C:15](=[O:17])[C@@H:2]([NH:1][C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:3][CH2:4][C:5]([O:6][CH2:7][C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[O:14])[CH2:29][CH2:28][CH2:27][CH2:26]1

참가 물질

6

반응물 3

HCID 111,2-DichloroethaneHCID 7298CyclopentanolHCID 83589L-Glutamic acid, N-((1,1-dimethylethoxy)carbonyl)-, 5-(phenylmethyl) ester

생성물 1

HCID 57292209(S)-2-tert-Butoxycarbonylamino-pentanedioic acid 5-benzyl ester 1-cyclopentyl ester수율 69%

시약·촉매·용매 2

HCID 142844-(Dimethylamino)pyridine촉매HCID 6344Dichloromethane용매2회

실험 절차

To a solution of Boc-L-Glu(OBzl)-OH (15 g, 44.5 mmol) in dichloromethane (220 ml) in an ice-bath, was added cyclopentanol (4.8 ml, 53.3 mmol, 1.2 eq), EDC (9.4 g, 48.9 mmol, 1.1 eq) and DMAP (543 mg, 4.4 mmol, 0.1 eq). The reaction mixture was allowed to warm to room temperature and stirred for 12 hours for complete reaction. The reaction mixture was diluted with DCM (200 ml) and washed with 1M HCl, 1M Na2CO3 and brine. The organic layer was then dried over magnesium sulphate and evaporated under reduced pressure. The product was purified by column chromatography using ethyl acetate/heptane (1:4) to give 12.4 g, 69% yield of title compound as a white solid.

후처리

  1. washwashed with 1M HCl, 1M Na2CO3 and brine
  2. dry with materialThe organic layer was then dried over magnesium sulphate
  3. customevaporated under reduced pressure
  4. customThe product was purified by column chromatography

출처 및 근거

ORD 기록
ord-55f94833f6d54f05a0415485214492d9
출처 데이터셋
uspto-grants-2012_01
특허 번호
US08106091B2

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