반응 #4830

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p-Chlorophenyltrichlorovinyl carbinol

sulfuric acid

z-methyl-2-chloro-3-(4'-methoxyphenyl)propenoate

Hydrogen chloride

→

z-methyl-2-chloro-3-(4'-chlorophenyl)propenoate

수율 93.0%

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후처리

1. 1
   온도The mixture is cooled

실험 절차

p-Chlorophenyltrichlorovinyl carbinol (6.0 g, 22.0 millimoles) is added to a refluxing solution of methanolic sulfuric acid (30 ml as noted in Example 4). Hydrogen chloride evolution is noted during the stirring procedure for 45 minutes. The mixture is cooled and has a workup as in Example 4, which affords z-methyl-2-chloro-3-(4'-chlorophenyl)propenoate (4.7 g, 20.4 millimoles) in 93 percent yield (M.P.=78° C.-80° C.): 'H NMR (CDCl3) δ 7.77 (1H, s), 7.45 (4H, ab quartet), 3.81 (3H, s); 13C NMR (CDCl3) δ 163.5, 136.1, 135.8, 131.6, 131.3, 128.8, 122.3, 53.4. Analysis calculated for: C, 52.01; H, 3.50. Found: C, 51.85; H, 3.42.

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