The ruthenium catalyst derived from Ru3(CO)12 and triphos [Ph2P(CH2CH2PPh2)2] promotes the direct C–C coupling of isoprene with aryl substituted hydantoins 1a–1f at the diene C4-position to furnish products of n-prenylation 2a–2f. A mechanism involving hydantoin dehydrogenation followed by diene-imine oxidative coupling to furnish a transient aza-ruthencyclopentene is proposed.
由 Ru3(CO)12 和三
磷 [Ph2P(CH2CH2PPh2)2] 衍生的
钌催化剂促进
异戊二烯与芳基取代的乙内酰
脲 1a-1f 在二烯 C4 位上直接 C-C 偶联,得到正
异戊二烯化产物 2a- 2f.提出了一种涉及乙内酰
脲脱氢然后二烯-
亚胺氧化偶联以提供瞬态氮杂-
钌环戊烯的机制。