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38 3 Vol. 38 No. 3
2008 6 Jun 2008

ٙĿtˎgw

4--5-һ-2-ĺϳ
ˇ  ղ h̴W(xu) ʡͷcGɫW(xu)ˇc(din)(sh) h 430073
ժҪԌˮʼԭ׻Ƶ4--2-Ȼcغ⛷Ƶ4--2--5-ښ⛴߻һƵ4--5--2-pˮƵðDZgw4--5-һ-2-ϳɿʞ24.5%ĿﻯW(xu)Y(jng)IR1H NMRMS_C
P(gun)I~4--5-һ-2-gwDZϳ
ЈD(li)̖0626.414īIRaA¾̖1009-9212200803- 0029-04
Synthesis of 4-Amino-5-ethylsulfonyl-2-methoxybenzoic Acid
LIU LeiYANG Yi-hongZHANG HengWANG Yu ZHAN Hui Hubei Key Laboratory of Novel Chemical ReactorGreen Chemical TechnologyWuhan Institute of TechnologyWuhan 430073 China
AbstractThe 4-amino-5-ethylsulfonyl-2-methoxybenzoic acidan intermediate of amisulpride was synthesized from 4-amino-2-hydroxybenzoic acid as material. Firstlythe methyl 4-amino-2-methoxybenzoate was obtained by the methylation of dimethyl sulfate. Thenthe methyl 4-amino-2-methoxy-5- thiocyanatobenzoate was prepared by the reaction of potassium thiocyanate with bromine. Furthermorethe methyl 4-amino-5-ethylthio-2-methoxy benzoicacid was formed from the ethylation of bromoethane at catalysis of potassium hydroxide. Finallythe 4-amino-5-ethylsulfonyl-2-methoxybenzoic acid was obtained via oxidation with hydrogen peroxide. The total yield was 24.5%. The chemical structure was confirmed by IR1H NMRMS.
Key words4-amino-5-ethylsulfonyl-2-methoxybenzoic acidintermediateamisulpridesynthesis
ߺ(jin)飺 ڣ1984-hTʿоˎϳɷоE-mailapplle@126.com
“(lin) ϵ ˣˇ磨1954-Ůˎ̌(zhun)I(y)̌W(xu)ˎоE-mailhong289@sina.com
ոڣ2008-05-20
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