Modification of singlet carbene reactivities by solvent
作者:H. Tomioka、Y. Ozaki、Y. Izawa
DOI:10.1016/s0040-4020(01)96743-2
日期:1985.1
The solventeffect on the reactivity of singlet carbenes has been investigated. Competition reactions between pairs of alcohols for arylcarbenes in various solvents indicates that the O—H insertion selectivity is influenced only by 1,4-dioxane. Thus, phenylcarbene is some 33 times more reactive toward methanol relative to t-butyl alcohol in 90 mol% dioxane than without solvent. Similar competition
Generation and cyclotrimerization of 1,4-dioxacyclohexyne (p-dioxyne)
作者:Miquel A. Pericàs、Antoni Riera、Oriol Rossell、Fèlix Serratosa、Miquel Seco
DOI:10.1039/c39880000942
日期:——
1,4-Dioxacyclohexyne (p-dioxyne) has been generated at low temperature in tetrahydrofuran solution from 2,3-dibromo-1,4-dioxacyclohexene, via 2-bromo-3-lithio-1,4-dioxacyclohexene, and isolated as the corresponding cyclotrimer tris(ethylendioxy)benzene (1,2,3,4,5,6,7,8,9,10,11,12-dodecahydro-1,4,5,8,9,12-hexaoxatriphenylene).