The induced decomposition of t-butyl peroxide in solution. Part I. Benzyl methyl ethers as solvents
作者:R. L. Huang、Tong-Wai Lee、S. H. Ong
DOI:10.1039/j39690002522
日期:——
attack by the ether radical ArĊH·OMe on the peroxidic O–O bond rather than coupling between the ether and t-butoxy-radicals, and evidence is presented to support this contention. From the acetal-to-dimer ratios found for the substituted ethers, namely, 0.07, 1.2, 0.5, ∞, ∞, 0, 0, and 0.2 respectively, it is concluded that the reaction is facilitated by increased electrophilicity in the ether radical.
在苄基甲基叔丁基过氧化物的分解醚ARCH 2 ·OME(AR = PH,p -CIC 6 ħ 4,米-CIC 6 ħ 4,p -NO 2 ·C 6 H ^ 4,3,4--CL 2 C 6 H 3,p -PhC 6 H 4,p -MeO·C 6 H 4和p- Bu t C 6 H 4)在110℃,得到,除了少量(3-13%,除了3,4--CL 2 ç 6 ħ 3 [省略图形]回家的醛ArCHO和不同量的二聚物(氩)的)2,缩醛ArCH(OMe)(OBu t)的产率分别为2· 8、36、17、85、62、0、0和8·5%。认为乙缩醛是通过S H形成的2由醚基ArĊH·OMe攻击过氧化物的O-O键,而不是醚与叔丁氧基基团之间的偶合,并提供了证据证明这一观点。从发现的取代醚的缩醛对二聚体比率,即分别为0.07、1.2、0.5,∞,∞,0、0和0.2,可以得出结论,该反应是通过提高醚基团的亲电性来促进的。