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Hydrochloric Acid → (E)-4-(2-(4-((2,4-Dioxothiazolidin-5-ylidene)methyl)phenoxy)ethoxy)benzoic acid

HRID 416293
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HRID 416293 반응식
[O:1]=[C:2]1[NH:6][C:5](=[O:7])/[C:4](=[CH:8]\[C:9]2[CH:28]=[CH:27][C:12]([O:13][CH2:14][CH2:15][O:16][C:17]3[CH:26]=[CH:25][C:20]([C:21]([O:23]C)=[O:22])=[CH:19][CH:18]=3)=[CH:11][CH:10]=2)/[S:3]1.CO.O.[OH-].[Li+].Cl>C1COCC1.O>[O:1]=[C:2]1[NH:6][C:5](=[O:7])/[C:4](=[CH:8]\[C:9]2[CH:10]=[CH:11][C:12]([O:13][CH2:14][CH2:15][O:16][C:17]3[CH:26]=[CH:25][C:20]([C:21]([OH:23])=[O:22])=[CH:19][CH:18]=3)=[CH:27][CH:28]=2)/[S:3]1
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7

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HCID 313Hydrochloric AcidHCID 887MethanolHCID 168937Lithium hydroxide, monohydrateHCID 58930528(E)-Methyl 4-(2-(4-((2,4-dioxothiazolidin-5-ylidene)methyl)phenoxy)ethoxy)benzoate

생성물 1

HCID 58930446(E)-4-(2-(4-((2,4-Dioxothiazolidin-5-ylidene)methyl)phenoxy)ethoxy)benzoic acid수율 22.6%

시약·촉매·용매 2

HCID 962
Water
용매
HCID 8028Tetrahydrofuran용매

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온도
60 °C

실험 절차

To a solution of methyl ester 356 (647 mg, 1.62 mmol) in THF (15 mL) was added methanol (2 mL), water (2 mL) and lithium hydroxide monohydrate (340 mg, 8.11 mmol). The mixture was heated at 60° C. for 1 hour, acidified with 10% HCl solution and extracted with ethyl acetate. The organic extract was dried over MgSO4, filtered, and evaporated to afford the title compound (141 mg, 22%). 1H NMR: (MeOD-d4) δ (ppm): 7.97 (d, J=8.8 Hz, 2H), 7.75 (s, 1H), 7.53 (d, J=8.8 Hz, 2H), 7.12 (d, J=8.8 Hz, 2H), 7.04 (d, J=8.8 Hz, 2H), 4.44 (4H, bs). LRMS (ESI): (calc.) 385.4; (found) 392.3 (MLi)+.

후처리

  1. extractionextracted with ethyl acetate
  2. extractionThe organic extract
  3. dry with materialwas dried over MgSO4
  4. filtrationfiltered
  5. customevaporated

출처 및 근거

ORD 기록
ord-34a261655e0b49459f2ee260446b1b86
출처 데이터셋
uspto-grants-2012_01
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08088805B2

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