Cyclopropanation of Alkenes, N–H and S–H Insertion of Ethyl Diazoacetate Catalysed by Ruthenium Porphyrin Complexes
作者:Erwan Galardon、Paul Le Maux、Gérard Simonneaux
DOI:10.1016/s0040-4020(99)01050-9
日期:2000.1
Isomeric distribution for the cyclopropanation of isoprene and 1,3-pentadiene with ethyl diazoacetate and competition studies of the cyclopropanation and diazo insertion into heteroatom–hydrogen bonds are also reported. All these results agree with a major electronic and steric influence on both the regiochemical and stereochemical control in the catalytic cyclopropanation and diazo insertion reactions
报道了钌卟啉催化重氮乙酸乙酯与苯乙烯衍生物和α-杂原子烯烃的环丙烷化反应的产物收率,立体选择性和区域选择性,并将其与其他金属卟啉催化剂催化的环丙烷化反应的立体选择性进行了比较。当竞争环丙烷化速率或产物立体异构体比率与苯乙烯上各种环取代基团的Hammet常数作图时,观察到线性相关性。还报道了异戊二烯和1,3-戊二烯与重氮乙酸乙酯环丙烷化的同分异构分布,以及环丙烷化和重氮插入杂原子-氢键的竞争研究。