Hydrochloric Acid → z-Methyl-2-chloro-3-(4'-methoxyphenyl)propenoate

HRID 4733

반응식

HRID 4733 반응식
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([CH:9]([C:11](Cl)=[C:12](Cl)Cl)O)=[CH:5][CH:4]=1.S(=O)(=O)(O)[OH:17].[CH3:21][OH:22].[ClH:23]>O>[CH3:21][O:22][C:12](=[O:17])/[C:11](/[Cl:23])=[CH:9]/[C:6]1[CH:7]=[CH:8][C:3]([O:2][CH3:1])=[CH:4][CH:5]=1

참가 물질

5

반응물 3

HCID 313Hydrochloric AcidHCID 15054139p-Methoxyphenyltrichlorovinyl carbinolHCID 18363649Sulfuric acid methanol

생성물 1

HCID 12339865z-Methyl-2-chloro-3-(4'-methoxyphenyl)propenoate수율 99%

시약·촉매·용매 1

HCID 962Water용매

실험 절차

p-Methoxyphenyltrichlorovinyl carbinol (2.3 g, 8.6 millimoles) is added to a 40:60 (V/V) solution of sulfuric acid/methanol which is stirred under nitrogen at reflux (100° C.-106° C.) for 7 minutes. Rapid evolution of hydrogen chloride is noted and ceases after this period. The solution is cooled and poured into 40 ml of water, followed by extraction twice with 20 ml of methylene chloride each time. The organic phase is dried over MgSO4, filtered and rotary evaporated giving z-methyl-2-chloro-3-(4'-methoxyphenyl)propenoate (1.92 g, 8.5 millimoles) in 99 percent yield as a light yellow oil which crystallized on standing (M.P.=68° C.-70° C., M.P.LIT1 =67° C.-70° C.): 'H NMR (CDCl3) δ 7.24 (4H, ab quartet), 7.72 (1H, s), 3.76 (3H, s), 3.68 (3H, s); 13C NMR (CDCl3) δ 164.0, 161.1, 136.7, 132.6, 125.4, 119.0, 113.9, 55.2, 53.0.

후처리

  1. temperatureat reflux (100° C.-106° C.) for 7 minutes
  2. waitceases after this period
  3. temperatureThe solution is cooled
  4. extractionfollowed by extraction twice with 20 ml of methylene chloride each time
  5. dry with materialThe organic phase is dried over MgSO4
  6. filtrationfiltered
  7. customrotary evaporated

출처 및 근거

ORD 기록
ord-2a2734eb88c143a38c09acebdd4195a1
출처 데이터셋
uspto-grants-1988_02
특허 번호
US04727181

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