of tertiary phosphines with carbonyl groups β to the P atom, ethene and CO react in methanol to give products involving increased chain growth (octane-3,6-dione, methyl 4-oxohexanoate) compared with PEt3 complexes and unsaturated products (methyl propenoate, penten-3-one and 1-methoxypentan-3-one from addition of methanol to penten-3-one); mechanistic studies suggest that the ligand carbonyl group prevents
使用在 P 原子上具有 β 位羰基的叔膦的
铑配合物,
乙烯和 CO 在
甲醇中反应,生成与 PEt3 配合物和不饱和产物相比增加链增长的产物(
辛烷-3,6-二酮、
4-氧代己酸甲酯)(将
甲醇加入到 penten-3-one 中得到的
丙烯酸甲酯、penten-3-one 和 1-methoxypentan-3-one);机理研究表明,
配体羰基阻止了生长链中酮基的配位。