作者:Monique Lüthy、Vincent Darmency、Philippe Renaud
DOI:10.1002/ejoc.201001120
日期:2011.1
Generation of radicals from B-alkylcatecholboranes represents an efficient tin-free procedure for the generation of alkyl radicals. A modified version of this method has been developed. The simple catechol is replaced by a dihydroxylated tetrahydroisoquinoline, which can be separated from the reaction products by simple extraction with an aqueous acid solution. The modified alkyl radical precursors are
从 B-烷基儿茶酚硼烷生成自由基代表了一种有效的无锡生成烷基自由基的方法。已经开发了该方法的修改版本。简单的儿茶酚被二羟基化的四氢异喹啉取代,它可以通过用酸水溶液简单萃取而从反应产物中分离出来。通过用 BH3 中心点 Me2S 进行硼氢化反应,然后用二羟基四氢异喹啉处理,很容易从烯烃制备改性烷基自由基前体。这种类型的新型烷基硼酸酯是各种反应中的合适自由基前体,例如苯磺酰化、烯丙基化、炔基化、乙烯基化和醌加成。当从儿茶酚残基中分离反应产物存在问题时,此策略特别有用,