嬉戏
开环复分解聚合
化学
复分解
钌
钒
催化作用
卡宾
钼
无环二烯复分解
盐变质反应
组合化学
聚合
高分子化学
有机化学
聚合物
作者
Kamal M. Dawood,Kotohiro Nomura
标识
DOI:10.1002/adsc.202001117
摘要
Abstract This review article summarizes reports for Z ‐selective olefin metathesis reactions by molybdenum, tungsten, ruthenium, and vanadium catalysts. It is clearly demonstrated that the ligand modifications play essential roles in achieving the stereospecific olefin metathesis reactions. In particular, Mo‐ and W‐alkylidene based complex catalysts having pyrrolide‐aryloxide [or bis(aryloxide)] were highly effective in the efficient enantioselective ring opening/cross‐metathesis (EROCM), cross metathesis (CM), homodimerization, ring‐opening metathesis polymerization (ROMP), and in ring closing metathesis (RCM) with high Z ‐ selectivities (∼>98%). Ruthenium‐carbene catalysts having cycloadamantyl, catechothiolate, phenolate and thiophenolate ligands display pronounced Z ‐selectivity (>98%) in efficient CM, ROCM, AROCM, RCM, ROMP reactions. Halogenated (arylimido)‐alkoxo vanadium‐alkylidenes were thermally robust and effective for efficient highly cis ‐specific ROMP of cyclic olefins to afford end‐functionalized ring‐opened polymers. magnified image
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