38 3 |  | Vol. 38 No. 3 | 2008 6 | Jun 2008 |
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ٙĿtˎgw
4--5-һ-2-ĺϳ |
ˇ ղ
h̴W(xu) ʡͷcGɫW(xu)ˇc(din)(sh) h 430073 |
ժҪԌˮʼԭƵ4--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 |
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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 |
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ߺ(jin)飺 ڣ1984-hTʿоˎϳɷоE-mailapplle@126.com
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(lin) ϵ ˣˇ磨1954-Ůˎ̌(zhun)I(y)̌W(xu)ˎоE-mailhong289@sina.com
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ոڣ2008-05-20
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