Divergent Synthesis of CF<sub>3</sub>
-Substituted Allenyl Nitriles by Ligand-Controlled Radical 1,2- and 1,4-Addition to 1,3-Enynes
作者:Fei Wang、Dinghai Wang、Yu Zhou、Ling Liang、Ronghua Lu、Pinhong Chen、Zhenyang Lin、Guosheng Liu
DOI:10.1002/anie.201803668
日期:2018.6.11
involved propargylic radicals can be selectively trapped by (Box)CuII cyanide, while the tautomerized allenyl radicals are trapped by (phen)CuII cyanide (Box= bisoxazoline, phen=phenanthroline). In addition, the reaction features broad substrate scope and excellent functional group compatibility. Moreover, this protocol represents a novel regioselectivity‐tunable functionalization of 1,3‐enynes via radicals
已经确定了一种配体控制的系统,该系统可实现1,3-炔烃的区域选择性三氟甲基氰化,从而可使用多种含CF 3的三或四取代的烯基腈。我们公开了所涉及的炔丙基自由基可以被(Box)Cu II氰化物选择性地捕获,而互变异构的烯基自由基则被(phen)Cu II捕获。氰化物(Box = bisoxazoline,phen = phenanthroline)。另外,该反应具有广泛的底物范围和优异的官能团相容性。此外,该方案代表了一种通过自由基对1,3-烯炔进行区域选择性调节的新型功能,我们认为这将对开发用于自由基和有机金属化学选择性控制的催化体系产生重大影响。