Method for ethenolysis of polyterpenes

摘要

Ethenolysis of acyclic polyterpenes comprising trisubstituted double bonds, comprises (a) contacting a polyterpene with a catalyst complex (I) or (II) in a pressure reactor, (b) purging the reactor with inert gas, preferably ethene, (c) reacting a mixture of polyterpene and catalyst complex with ethene, (d) terminating the addition of ethene, cooling to room temperature and optionally unwinding at ambient pressure, and (e) optionally separating the resulting fission products. Ethenolysis of acyclic polyterpenes comprising trisubstituted double bonds, comprises (a) contacting a polyterpene with a catalyst complex compound comprising phenyl derivative of formula [(Z)(Z 1>)MX 2(CHP1)] (I) or [(Z)(Z 1>)MX 2(3-phenylindenylid-1-ene)] (II) in a pressure reactor, (b) purging the reactor with inert gas, preferably ethene, (c) reacting a mixture of polyterpene and catalyst complex with ethene at ethene pressure of 1-100 bar and a temperature of 60-150[deg] C, for 15 minutes to 24 hours, (d) terminating the addition of ethene, cooling to room temperature and optionally unwinding at ambient pressure, and (e) optionally separating the resulting fission products. Z : N-heterocyclic carbene ligand, where Z is at least as electron rich as Z 1>; Z 1>electron withdrawing group; M : Ru, Os and W; X : F, Cl, Br, I, CN, SCN, OCN, NCO; and P1 : phenyl. An independent claim is also included for degradation products of polyterpenes natural rubber, liquid natural rubber and squalene of formulae (CH 2=CH-CH 2-[CH 2-C(CH 3)=CH-CH 2] n-CH 2-C(CH 3)=CH 2) (II), (CH 2=C(CH 3)-CH 2-[CH 2-CH=C(CH 3)-CH 2] m-CH 2-CH=CH 2) (III), (CH 3-C(CH 3)=CH-CH 2-[CH 2-C(CH 3)=CH-CH 2] 2-[CH 2-CH=C(CH 3)-CH 2] P-CH 2-CH=CH 2) (IVa), (CH 2=CH-CH 2-[CH 2-C(CH 3)=CH-CH 2] q-CH 2-CH=C(CH 3)-CH 2-CH 2-CH=CH 2) (IVb), and (CH 2=CH-CH 2-[CH 2-C(CH 3)=CH-CH 2] 2-CH 2-CH=CH 2) (IVc), obtainable by the method mentioned above.