Hydrochloric Acid → Dimethyl 3-aminobenzene-1,2-dicarboxylate

HRID 448310

반응식

HRID 448310 반응식
Cl.[CH3:2][O:3][C:4](=[O:18])[C:5]1[C:6](=[C:11]([N+:15]([O-])=O)[CH:12]=[CH:13][CH:14]=1)[C:7]([O:9][CH3:10])=[O:8].[Sn](Cl)(Cl)(Cl)Cl>C(O)C>[CH3:2][O:3][C:4](=[O:18])[C:5]1[C:6](=[C:11]([NH2:15])[CH:12]=[CH:13][CH:14]=1)[C:7]([O:9][CH3:10])=[O:8]

참가 물질

5

반응물 3

HCID 313Hydrochloric AcidHCID 24287Tin tetrachlorideHCID 2499121,2-Benzenedicarboxylic acid, 3-nitro-, 1,2-dimethyl ester

생성물 1

HCID 13399384Dimethyl 3-aminobenzene-1,2-dicarboxylate수율 86%

시약·촉매·용매 1

HCID 702Ethanol용매

실험 절차

A mixture of 3:1 ethanol-conc. HCl (200 mL) was cooled to 0° C. and then 3-nitrophthalic acid dimethyl ester (15.0 g, 62.8 mmol) was added. Maintaining the cooling, tin chloride (70.8 g, 314 mmol) was added portionwise, over a period of 15 minutes. Following completion of the addition, the cooling bath was removed, and stirring proceeded at room temperature. After 2 hours, the mixture was neutralized by the addition of solid sodium bicarbonate, and the resulting mixture was extracted with ethyl acetate (3×150 mL) and the combined extracts were washed with water (5×250 mL), were dried (MgSO4) and evaporated, providing 11.3 g of the product as a yellow oil in 86% yield: 1H NMR (CDCl3) δ 3.84 (s, 3H), 3.86 (s, 3H), 5.20 (br, 2H), 6.78 (dd, J=8.5 Hz, J=1.0 Hz, 1H), 6.90 (dd, 1H, J=7.3 Hz, J=1.0 Hz, 1H), 7.24 (t, J=7.8 Hz, 1H).

후처리

  1. additionwas added portionwise, over a period of 15 minutes
  2. additioncompletion of the addition
  3. customthe cooling bath was removed
  4. customproceeded at room temperature
  5. additionthe mixture was neutralized by the addition of solid sodium bicarbonate
  6. extractionthe resulting mixture was extracted with ethyl acetate (3×150 mL)
  7. washthe combined extracts were washed with water (5×250 mL)
  8. dry with materialwere dried (MgSO4)
  9. customevaporated

출처 및 근거

ORD 기록
ord-8c26a8759ae6499b95cec6f2001d4c03
출처 데이터셋
uspto-grants-2013_07
특허 번호
US08481568B2

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