发明名称 |
METHOD FOR PREPARING OF MONO OR DI-2-SUBSTITUTED CYCLOPENTANONE |
摘要 |
Method for the preparation of mono or di-2-substituted cyclopentanone characterized in that it consists in performing in sequence four stages (a) to (d) which can be successively carried out, if desired, in the same reactor: (a) addition of alkyl acetoacetate to 1,3-butadiene, optionally 2-substituted; (b) the addition product formed is subjected to deacylation, following by an alkaline hydrolysis reaction and acidification to produce a carboxylic monacid having 6 carbon atoms in its main chain; (c) said monacid is subjected to hydroxycarbonylation to produce an .alpha.,.omega.-carboxylic diacid having 6 carbon atoms in its mains chain; and (d) said diacid is subjected to cyclizing decarboxylation. The invention is especially intended for the preparation of 2,2-dimethylcyclopentanone.
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申请公布号 |
CA2173618(A1) |
申请公布日期 |
1995.04.13 |
申请号 |
CA19942173618 |
申请日期 |
1994.10.04 |
申请人 |
RHONE-POULENC AGROCHIMIE |
发明人 |
BUFORN, ALBERT;CLAVEL, JEAN-LOUIS;CROCHEMORE, MICHEL |
分类号 |
B01J31/24;C07B61/00;C07C45/48;C07C45/54;C07C49/395;C07C49/517;C07C49/657;C07C49/753;C07C51/09;C07C51/10;C07C51/12;C07C53/126;C07C55/00;C07C67/317;C07C67/32;C07C67/347;C07C69/533;C07C69/593;C07C69/738;(IPC1-7):C07C49/395;C07C55/02;C07C59/347;C07C51/373 |
主分类号 |
B01J31/24 |
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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