Redox-Neutral Photocatalytic Cyclopropanation via Radical/Polar Crossover
作者:James P. Phelan、Simon B. Lang、Jordan S. Compton、Christopher B. Kelly、Ryan Dykstra、Osvaldo Gutierrez、Gary A. Molander
DOI:10.1021/jacs.8b05243
日期:2018.6.27
A benchtop stable, bifunctional reagent for the redox-neutral cyclopropanation of olefins has been developed. Triethylammonium bis(catecholato)iodomethylsilicate can be readily prepared on multigram scale. Using this reagent in combination with an organic photocatalyst and visible light, cyclopropanation of an array of olefins, including trifluoromethyl- and pinacolatoboryl-substituted alkenes, can
作者:Ryan Gianatassio、Shuhei Kawamura、Cecil L Eprile、Klement Foo、Jason Ge、Aaron C. Burns、Michael R. Collins、Phil S. Baran
DOI:10.1002/anie.201406622
日期:2014.9.8
A simple method to convert readily available carboxylic acids into sulfinate salts by employing an interrupted Barton decarboxylation reaction is reported. A medicinally oriented panel of ten new sulfinate reagents was created using this method, including a key trifluoromethylcyclopropanation reagent, TFCS‐Na. The reactivity of six of these salts towards CH functionalization was field‐tested using
报道了一种通过使用间断的 Barton 脱羧反应将容易获得的羧酸转化为亚磺酸盐的简单方法。使用这种方法创建了一个由十种新亚磺酸盐试剂组成的医学导向面板,其中包括一种关键的三氟甲基环丙烷化试剂 TFCS-Na。使用几种不同类别的杂环对这些盐中的六种对C H 官能化的反应性进行了现场测试。