反应详情

4-Chlorphenol was reacted with succinic anhydride and aluminium chloride in a similar manner to the procedure described in Example 8 (i) to give 3-(5-chloro-2-hydroxybenzoyl)propionic acid (49%, m.p. 172°-173° C). (Found: M+, 228/230. C10H9Cl O4 requires: M, 228/230). (ii) 3-(5-Chloro-2-hydroxybenzoyl)propionic acid was esterified with methanol-hydrogen chloride in a similar manner to the procedure described in Example 1 (i) to give methyl 3-(3-chloro-2-hydroxybenzoyl)propionate (75%).