发明名称 |
Process for the hydroxyalkylation of a carbocyclic aromatic ether |
摘要 |
PCT No. PCT/FR96/00778 Sec. 371 Date Jan. 23, 1997 Sec. 102(e) Date Jan. 23, 1997 PCT Filed May 24, 1996 PCT Pub. No. WO96/37452 PCT Pub. Date Nov. 28, 1996The present invention concerns a process for the hydroxyalkylation of a carbocyclic aromatic ether. The invention preferably relates to the preparation of 3-methoxy-4-hydroxybenzyl alcohol by the hydroxymethylation of guaiacol. It also concerns the oxidation of the hydroxyalkylated ethers obtained, in particular the oxidation of 3-methoxy-4-hydroxybenzyl alcohol to 3-methoxy-4-hydroxybenzaldehyde, commonly known as "vanillin". The process for the hydroxyalkylation of a carbocyclic aromatic ether of the invention consists of reacting the aromatic ether with a carbonyl compound in the presence of a catalyst and is characterized in that the hydroxyalkylation reaction is carried out in the presence of an effective quantity of a zeolite.
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申请公布号 |
US5811587(A) |
申请公布日期 |
1998.09.22 |
申请号 |
US19970776495 |
申请日期 |
1997.01.23 |
申请人 |
RHONE-POULENC CHIMIE |
发明人 |
MOREAU, CLAUDE;RAZIGADE-TROUSSELIER, SYLVIE;FINIELS, ANNIE;FAJULA, FRANCOIS;GILBERT, LAURENT |
分类号 |
B01J29/06;C07B41/02;C07B61/00;C07C41/30;C07C43/23;C07C45/38;C07C47/575;(IPC1-7):C07C45/36 |
主分类号 |
B01J29/06 |
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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