Oxidation of acyclic alkenes and allyl and benzyl ethers with DIB/t-BuOOH/Mg(OAc)2
作者:Thanapat Sastraruji、Stephen G. Pyne、Alison T. Ung
DOI:10.1016/j.tet.2011.10.112
日期:2012.1
Oxidation of (11Z)-1′,2′-didehydrostemofoline with DIB/TBHP/Mg(OAc)2·4H2O resulted in oxidative cleavage of the C-11–C-12 double bond instead of the desired allylic oxidation of the 1-butenyl side chain. Stemofoline gave a similar result. The oxidation of more simple terminal alkenes was regioselective and gave vinyl ketones while allyl and benzyl ethers gave acrylate and benzoate esters, respectively
用DIB / TBHP / Mg(OAc)2 ·4H 2 O氧化(11 Z)-1',2'-二氢硬脂酰脯氨酸会导致C-11–C-12双键的氧化裂解,而不是所需的烯丙基氧化1-丁烯基侧链。Stemofoline给出了类似的结果。更简单的末端烯烃的氧化是区域选择性的,得到乙烯基酮,而烯丙基和苄基醚分别得到丙烯酸酯和苯甲酸酯。烯丙基和苄基醚可以在末端烯基或苄基存在下进行化学选择性氧化。与1-取代的环己烯的氧化相反,内部烯烃的氧化对区域的选择性差。