Synthesis and Applications of RuCl<sub>2</sub>(CHR‘)(PR<sub>3</sub>)<sub>2</sub>: The Influence of the Alkylidene Moiety on Metathesis Activity
作者:Peter Schwab、Robert H. Grubbs、Joseph W. Ziller
DOI:10.1021/ja952676d
日期:1996.1.1
reactions of RuCl2(PPh3)3 with a number of diazoalkanes were surveyed, and alkylidene transfer to give RuCl2(CHR)(PPh3)2 (R = Me (1), Et (2)) and RuCl2(CH-p-C6H4X)(PPh3)2 (X = H (3), NMe2 (4), OMe (5), Me (6), F (7), Cl (8), NO2 (9)) was observed for alkyl diazoalkanes RCHN2 and various para-substituted aryl diazoalkanes p-C6H4XCHN2. Kinetic studies on the living ring-opening metathesis polymerization (ROMP)
研究了 RuCl2(PPh3)3 与许多重氮烷的反应,亚烷基转移得到 RuCl2(CHR)(PPh3)2(R = Me (1),Et (2))和 RuCl2(CH-p-C6H4X) )(PPh3)2 (X = H (3), NMe2 (4), OMe (5), Me (6), F (7), Cl (8), NO2 (9)) 观察到烷基重氮烷 RCHN2 和各种对位取代的芳基重氮烷烃 p-C6H4XCHN2。使用配合物 3-9 作为催化剂的降冰片烯活性开环复分解聚合 (ROMP) 的动力学研究表明,在所有情况下,引发都比传播快(ki/kp = 9 for 3),并且 X 对3-9的复分解活性相对较小。3-9 中的膦与三环己基膦交换生成 RuCl2(CH-p-C6H4X)(PCy3)2 10-16,这是环辛烯 (PDI = 1.51-1.63) 和 1,5-环辛二烯 (PDI = 1.56-1