Water → 2-[2,4-dichloro-5-(1-methylethoxy)phenyl]-6-methyl-1,2,4-triazine-3,5(2H,4H)-dione

HRID 35422노트

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HRID 35422 반응식
[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[C:5]([O:9][CH:10]([CH3:12])[CH3:11])=[CH:4][C:3]=1[N:13]1[C:17](=[O:18])[NH:16][C:15]([CH3:20])([CH3:19])[NH:14]1.C(O)(=O)C(C)=[O:23].O>O1CCOCC1.S(=O)(=O)(O)O>[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[C:5]([O:9][CH:10]([CH3:12])[CH3:11])=[CH:4][C:3]=1[N:13]1[C:17](=[O:18])[NH:16][C:19](=[O:23])[C:15]([CH3:20])=[N:14]1

참가 물질

6

반응물 3

HCID 962WaterHCID 1060Pyruvic Acid2회HCID 147478291-[2,4-Dichloro-5-(1-methylethoxy)phenyl]-3,3-dimethyl-1,2,4-triazolidin-5-one

생성물 1

HCID 142769432-[2,4-dichloro-5-(1-methylethoxy)phenyl]-6-methyl-1,2,4-triazine-3,5(2H,4H)-dione수율 58.6%

시약·촉매·용매 2

HCID 1118Sulfuric Acid촉매HCID 312751,4-Dioxane용매

실험 절차

To a stirred mixture of 1.0 g (0.0031 mole) of 1-[2,4-dichloro-5-(1-methylethoxy)phenyl]-3,3-dimethyl-1,2,4-triazolidin-5-one in 10 mL of p-dioxane was added 0.29 g (0.0031 mole) of pyruvic acid and one drop of concentrated sulfuric acid. The mixture was stirred at room temperature for one hour, then an additional 0.25 g (0.0029 mole) of pyruvic acid was added. The mixture was heated at 90° C. for three hours, then poured into water. The mixture was extracted with ethyl acetate, and the solvent was evaporated from the extract under reduced pressure to give an oil. The oil was purified by thin-layer preparative chromatography on silica gel, eluting with ethyl acetate:heptane (1:1). Extraction of the appropriate bands gave 0.6 g of 2-[2,4-dichloro-5-(1-methylethoxy)phenyl]-6-methyl-1,2,4-triazine-3,5(2H,4H)-dione as a solid (mp 163°-164° C.), Compound 10 in the tables.

후처리

  1. temperatureThe mixture was heated at 90° C. for three hours
  2. extractionThe mixture was extracted with ethyl acetate
  3. customthe solvent was evaporated from the
  4. extractionextract under reduced pressure
  5. customto give an oil
  6. customThe oil was purified by thin-layer preparative chromatography on silica gel
  7. washeluting with ethyl acetate:heptane (1:1)
  8. extractionExtraction of the appropriate bands

출처 및 근거

ORD 기록
ord-61e5df5ed54e45239fddd602ea4f2845
출처 데이터셋
uspto-grants-1988_08
특허 번호
US04766233

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