Electronic effects in the regioselectivity of the singlet oxygen and 4-methyl-1,2,4-triazoline-3,5-dione ene reactions with isobutenylarenes
作者:Mariza N. Alberti、Georgios C. Vougioukalakis、Michael Orfanopoulos
DOI:10.1016/s0040-4039(02)02783-1
日期:2003.1
The regioselectivity of the ene pathway in the photooxidation of several 1-aryl-2-methylpropenes, as probed by stereoselective deuterium-labeling, depends on the electronic nature of the para phenyl-substituents. The reaction of the same array of alkenylarenes with 4-methyl-1,2,4-triazoline-3,5-dione (MTAD) gives ene products with an impressive >97% allylic hydrogen abstraction from the more substituted
在几个1-芳基-2- methylpropenes光氧化的烯通路的区域选择性,作为探测通过立体选择性氘标记,依赖于的电子性质对苯基取代基。相同烯基芳烃阵列与4-甲基-1,2,4-三唑啉-3,5-二酮(MTAD)的反应,从烯烃的取代度更高的侧面得到的烯类产品中,烯丙基氢的夺取率高出97%。