1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 1-[3-(3,4-Dihydro-5-hydroxy-2,2,4-trimethyl-7-pentyl-2H-1-benzopyran-3-yl)-1-oxopropoxy]-2,5-pyrrolidinedione

HRID 399164노트

반응식

HRID 399164 반응식
[OH:1][C:2]1[C:7]2[CH:8]([CH3:19])[CH:9]([CH2:14][CH2:15][C:16]([OH:18])=[O:17])[C:10]([CH3:13])([CH3:12])[O:11][C:6]=2[CH:5]=[C:4]([CH2:20][CH2:21][CH2:22][CH2:23][CH3:24])[CH:3]=1.O[N:26]1[C:30](=[O:31])[CH2:29][CH2:28][C:27]1=[O:32].C(N=C=NCCCN(C)C)C>C(Cl)Cl>[OH:1][C:2]1[C:7]2[CH:8]([CH3:19])[CH:9]([CH2:14][CH2:15][C:16](=[O:18])[O:17][N:26]3[C:30](=[O:31])[CH2:29][CH2:28][C:27]3=[O:32])[C:10]([CH3:13])([CH3:12])[O:11][C:6]=2[CH:5]=[C:4]([CH2:20][CH2:21][CH2:22][CH2:23][CH3:24])[CH:3]=1

참가 물질

5

반응물 3

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 80170N-HydroxysuccinimideHCID 189701453,4-Dihydro-5-hydroxy-2,2,4-trimethyl-7-pentyl-2H-1-benzopyran-3-propanoic acid

생성물 1

HCID 189701411-[3-(3,4-Dihydro-5-hydroxy-2,2,4-trimethyl-7-pentyl-2H-1-benzopyran-3-yl)-1-oxopropoxy]-2,5-pyrrolidinedione수율 78.2%

시약·촉매·용매 1

HCID 6344Dichloromethane용매2회

실험 절차

To a solution of 297 mg (0.88 mmol) of 3,4-Dihydro-5-hydroxy-2,2,4-trimethyl-7-pentyl-2H-1-benzopyran-3-propanoic acid in 20 mL of anhy. CH2Cl2 under argon was added 246 mg (2.14 mmol) of N-hydroxysuccinimide (Aldrich) and the reaction stirred for 15 min. 408 mg (2.14 mmol) of 1-ethyl-3-(dimethylaminopropyl)carbodiimide (Sigma) was then added and the reaction stirred at RT for 3 hr. The reaction was diluted to five times the volume with CH2Cl2, washed with 0.1N aq. HCl that had been saturated with NaCl, followed by sat. aq. NaCl, followed by sat. aq. NaHCO3 (×3), dried and evaporated under reduced pressure. The residue was purified by flash chromatography on silica gel, eluting with 1:1 EtOAc-CH2Cl2. The product fractions were combined and evaporated under reduced pressure and dried under high vacuum to give 297 mg (78%) of 1-[3-(3,4-Dihydro-5-hydroxy-2,2,4-trimethyl-7-pentyl-2H-1-benzopyran-3-yl)-1-oxopropoxy]-2,5-pyrrolidinedione as a white foam. HR (+) FAB MS: Calc (M+H), 432.2386; Observed, 432.2413.

후처리

  1. stirringthe reaction stirred at RT for 3 hr
  2. washwashed with 0.1N aq. HCl that
  3. customdried
  4. customevaporated under reduced pressure
  5. customThe residue was purified by flash chromatography on silica gel
  6. washeluting with 1:1 EtOAc-CH2Cl2
  7. customevaporated under reduced pressure
  8. customdried under high vacuum

출처 및 근거

ORD 기록
ord-95367b5dd3074a9e9d361d824470577a
출처 데이터셋
uspto-grants-1998_10
특허 번호
US05817766

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