申请人:ISTITUTO GUIDO DONEGANI S.p.A.
公开号:EP0054954A1
公开(公告)日:1982-06-30
A process is described for preparing dienoic acids, in particular octadienoic "3,6" and "2,6" acids, by reacting butadiene with a 3-butenoic acid of formula (I):
wherein R; R1; R2; R3, either like or unlike one another, are hydrogen atoms or alkyl groups having up to 4 carbon atoms, optionally containing double bonds and/or inert substituting groups, such as alkyl, alkoxyl, carboalkoxyl groups, in an inert atmosphere, at a temperature within the range of from 60° to 140°C approximately and in the presence of at least a catalyst selected from amongst the phosphinic complexes of Rhodium and/or the phosphitic complexes of Nickel having formulae (III), (IV), (V) and (VI):
wherein R4 is a hydrocarbyl group having up to 15 carbon atoms, optionally substituted by inert groups; L is a linear or cyclic olefin having from 2 to 10 carbon atoms or a chelating olefin having from 6 to 10 carbon atoms; n is an integer from 1 to 3, m is an integer from 0 to 2, such that n + m = 2 or 3, p is an integer from 0 to 3, such that n + p = 3 or 4; COD is 1,5-cyclooctadiene, and q is an integer from 1 to 4; X is an anion selected from the haloid anions, preferably the hydrochloric anion, and the anions of carboxylic acids having up to 4 carbon atoms; Y is selected from amongst BF4- , PF6-, ClO4-, B(Ph),-, wherein Ph is a phenyl; R5 is an aryl or an alkyl having up to 12 carbon atoms. Low coordinating Y anions may be generally used.
The resulting compounds are utilized as intermediates for organic syntheses.
描述了一种通过丁二烯与式 (I) 的 3-丁烯酸反应制备二烯酸,特别是八二烯 "3,6" 和 "2,6 "酸的工艺:
其中 R;R1;R2;R3,可以是氢原子,也可以是不超过 4 个碳原子的烷基,可以是含有双键的烷基和/或惰性取代基,如烷基、烷氧基、羧基,反应在惰性气氛中,温度约为 60°至 140°C,催化剂至少选自具有式 (III)、(IV)、(V) 和 (VI) 的铑的磷酸盐络合物和/或镍的磷酸盐络合物:
其中 R4 是具有最多 15 个碳原子的烃基,可选择被惰性基团取代;L 是具有 2 至 10 个碳原子的线性或环状烯烃,或具有 6 至 10 个碳原子的螯合烯烃;n 是 1 至 3 的整数,m 是 0 至 2 的整数,从而 n + m = 2 或 3,p 是 0 至 3 的整数,从而 n + p = 3 或 4;COD 是 1,5-环辛二烯,q 是 1 至 4 的整数;X 是选自卤素阴离子(最好是盐酸阴离子)和具有最多 4 个碳原子的羧酸阴离子的阴离子;Y 选自 BF4-、PF6-、ClO4-、B(Ph),-,其中 Ph 是苯基;R5 是芳基或具有最多 12 个碳原子的烷基。一般可使用低配位的 Y 阴离子。
所得化合物可用作有机合成的中间体。