Rate consts. were detd. for the addn. of 4-RC6H4• (R = H, MeO, Me, Cl, O2N) to 1,4-benzoquinone (I) and MeCOCOMe in DMSO. The aryl radicals show only a low sensitivity to polar effects. Arenediazonium salt-alkyl iodide mixts. were used to alkylate 1,4-naphthoquinone and I in DMSO. The method is versatile but gave only moderate yields (25-50% for monoalkylation and 5-15% for dialkylation), owing to the high reactivity of aryl radicals towards quinones
Absolute rate constants for addition of aryl radicals to 1,4-benzoquinone and butane-2,3-dione. A new method for homolytic alkylation of quinones
CITTERIO, ATTILIO;VISMARA, ELENA;
1983-01-01
Abstract
Rate consts. were detd. for the addn. of 4-RC6H4• (R = H, MeO, Me, Cl, O2N) to 1,4-benzoquinone (I) and MeCOCOMe in DMSO. The aryl radicals show only a low sensitivity to polar effects. Arenediazonium salt-alkyl iodide mixts. were used to alkylate 1,4-naphthoquinone and I in DMSO. The method is versatile but gave only moderate yields (25-50% for monoalkylation and 5-15% for dialkylation), owing to the high reactivity of aryl radicals towards quinonesFile in questo prodotto:
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