Method of making an immobilized tungsten catalyst comprising or consisting of (≡SiO)X W(═O)(═CR1R2)(R3 or R4)2-x(L)z, comprising at least the following step (i): (i) reacting silica (Si02) with a tungsten oxo alkylidene complex comprising or consisting of (R3)(R4)W(═O)(═CR1R2)(L)y, preferably wherein ═CR1R2 is selected from ═CHC(CH3)3 or ═CH(C(CH3)2)C6H5 and R3 and R4 are independently selected from pyrrol-1-yl, 2,5-dimethylpyrrol-1-yl, or 2,5-diphenylpyrrol-1-yl, or —OR, wherein R is a six membered or 10 membered aryl ring, optionally substituted.
由(≡SiO)X W(═O)(═CR1R2)(R3或R4)2-x(L)z组成或构成的固定化
钨催化剂的制造方法,至少包括下列步骤(i):(i) 使
二氧化硅(Si02)与
钨氧化亚烷基配合物反应,该配合物包括或由 (R3)(R4)W(═O)(═CR1R2)(L)y,优选其中═CR1R2选自═CHC(
CH3)3或═CH(C( )2)
C6H5,R3和R4独立地选自
吡咯-1-基、
2,5-二甲基吡咯-1-基或 2,5-二苯基
吡咯-1-基,或 -OR,其中 R 是任选被取代的 6 个或 10 个芳基环。