The Pd-catalyzed coupling of N-allylguanidines or N-allylureas with O-benzoylhydroxylamine derivatives affords cyclic guanidines or cyclic ureas bearing dialkylaminomethyl groups. The desired products are obtained in good yield, and substrates bearing substituents at the allylic position are transformed with moderate diastereoselectivity. The mechanism of these reactions appears to involve anti-aminopalladation
N-
烯丙基胍或N-烯丙基
脲与O-苯甲酰
羟胺衍
生物的Pd催化偶联得到带有二烷基
氨基甲基的环状
胍或环状
脲。以良好的收率获得了所需的产物,并且在烯丙基位置带有取代基的底物以中等的非对映选择性进行转化。这些反应的机制似乎涉及烯烃的反
氨基
钯化,然后是含有 β-氢原子的烷基
钯络合物中罕见的 sp 3 C-sp 3 N 键形成还原消除。