发明名称 |
Acid chlorides prepn. from organic acids and phosgene - with a hexa-alkyl phosphorotriamide catalyst at elevated temp. |
摘要 |
<p>Prodn. of acid chlorides by heating COCl2 with organic acids in the presence, as catalyst, of a phosphoric acid triamide of formula O=P- N(R)2- -3 (where each R is 1-4 C alkyl). The pref. catalyst is hexamethylphosphotriamide. The reaction is pref. performed at 100-150 degrees C using 1-5 mol % of catalyst (based on the organic acid) e.g. 2,2-di-Me-propionic or 3,5,5-tri-Me-hexanoic. The prod. may be sepd. by distn. from the catalyst which is pref. recycled to a new reaction. Acid chlorides are useful intermediates in organic syntheses. The difference in b.pt. between the catalysts and acid chlorides allows a simple sepn. and the catalyst remains active after several successive reactions.</p> |
申请公布号 |
FR2337122(A1) |
申请公布日期 |
1977.07.29 |
申请号 |
FR19750040210 |
申请日期 |
1975.12.31 |
申请人 |
POUDRES ET EXPLOSIFS STE NALE |
发明人 |
JULIEN CYRILLE MAURICE DEWEERDT ET BERNARD ROBERT-COLOMBY |
分类号 |
B01J31/00;C07B61/00;C07C51/00;C07C51/60;C07C67/00;(IPC1-7):07C51/58 |
主分类号 |
B01J31/00 |
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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