发明名称 |
METHOD OF SYNTHESIS OF DERIVATIVES 3-CARBOXY-4-HYDROXYBENZALDEHYDE, METHOD OF SYNTHESIS OF 4-HYDROXYBENZALDEHYDE, METHODS OF SYNTHESIS OF VANILLIN AND ETHYLVANILLIN |
摘要 |
organic chemistry, chemical technology. SUBSTANCE: invention relates to a method of synthesis of derivatives of 3-carboxy-4- hydroxybenzaldehydes from phenolic compounds carrying formyl and/or hydroxymethyl groups at positions 2 and 4. Invention describes also synthesis of 4-hydroxy-benzaldehyde from 3-carboxy-4- hydroxybenzaldehyde and synthesis of 3-methoxy-4-hydroxybenzaldehyde and 3-ethoxy-4-hydroxybenz- aldehyde named as "vanillin" and "ethylvanillin", respectively. Method of synthesis of 3-carboxy-4- hydroxybenzaldehyde is carried out by selective oxidation of phenolic compound comprising formyl group and/or hydroxymethyl group at position 2 or 4 being the group at position 2 is oxidized to carboxyl group and hydroxymethyl group at position 4 is oxidized to formyl group if necessary. Decarboxylation of 3-carboxy-4- hydroxybenzaldehyde results to formation of 4-hydroxy-benzaldehyde. EFFECT: improved methods of synthesis. 26 cl, 13 ex
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申请公布号 |
RU2186055(C2) |
申请公布日期 |
2002.07.27 |
申请号 |
RU19970102717 |
申请日期 |
1996.05.24 |
申请人 |
RON-PULENK SHIMI |
发明人 |
METIV'E PASKAL' |
分类号 |
B01J23/42;B01J23/44;C07B61/00;C07C45/38;C07C45/65;C07C45/67;C07C47/575;C07C47/58;C07C51/255;C07C65/30;C07C201/12;C07C205/61;(IPC1-7):C07C65/30 |
主分类号 |
B01J23/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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