摘要:
Octadienyl esters of 2-ethylidene-hepta-3,5-dienoic and 2-vinyl-hepta-3,5-dienoic acids of formula C.sub.8 H.sub.11 COOC.sub.8 H.sub.13 and .delta.-lactone of formula ##STR1## or 2-ethylidene-hepta-6-ene-5-olide, are prepared by reaction of 1,3-butadiene with CO.sub.2 at a temperature comprised between about 20.degree. and 150.degree. C. and at a total pressure between about 10 and 500 atm in the presence of a phosphinic complex of palladium having the formula Pd[P(R).sub.3 ].sub.x, wherein x is an integer from 2 to 4, and (R).sub.3 is a homogeneous or heterogeneous group consisting of alkyls, cycloalkyls having up to 8 carbon atoms and of phenyls, also substituted, in an inert atmosphere.The obtained products are "per se" new and are valuable intermediates for synthesis of chemicals (fungicides, pesticides, etc.) and in particular as effective plasticizers.
摘要翻译:式C 8 H 11 COOC 8 H 13的2-亚乙基 - 庚-3,5-二烯酸和2-乙烯基 - 庚-3,5-二烯酸的辛二烯基酯和式(II)的δ-内酯或2-亚乙基 - 七 烯-5-醇通过1,3-二丁烯与CO 2在约20-150℃的温度下反应并在约10-500atm的总压下在次膦酸盐络合物 具有式Pd [P(R)3] x的钯,其中x是2至4的整数,(R)3是由烷基,具有至多8个碳原子的环烷基和苯基组成的均相或异质基团 也在惰性气氛中取代。