- 作者: 廖仁海 ; 鄭光原 ; 方俊民 等
- 作者服務機構: 台灣大學化學系
- 中文摘要: Alkenes and sulfides were oxidized with transition- metal catalysts. The oxidant sources include molecular dioxygen, air and iodosylbenzene. The metal ions Mn(III), Fe(III), Co(II) and Ni(II) were used. The catalysts 1-18 of 1,3-dioxo-, .beta.- ketoimine- or salen-types were prepared and their efficacy was examined. 1,2-Dihydronaphthalene is most efficiently epoxidized with O/sub 2//Me/sub 2/CHCHO or PhIO in the presence of Mn(III)-salen catalysts. The Ni(II)-, Co(II)- and Fe(III)-catalysts of either .beta.-ketoimine- or salen-types are useful for epoxidation of styrene, (E)- stilbene and (E)-benzalacetone in the O/sub 2//Me/sub 2/ CHCHO system; these epoxidations are stereospecific without formation of corresponding diastereomeric epoxides. Oxidation of methyl p-tolyl sulfide with O/sub 2//Me/sub 2/ CHCHO is facilitated by the 1,3-dioxo-catalyst Co(II)-(1). Monooxidation is achieved with Me/sub 2/CHCHO in equimolar proportions to give the corresponding sulfoxide, whereas overoxidation is realized with excess Me/sub 2/CHCHO to give the sulfone. These epoxidation and sulfide oxidations all occur at 25.degree.C and are complete in less than a day.
- 英文摘要: --
- 中文關鍵字: Oxidation; Transition Metal; Alkene; Sulfide; Diketone; Salen
- 英文關鍵字: 氧化;過渡金屬;烯屬烴;硫化物;二酮;沙林