Mild, Redox-Neutral Formylation of Aryl Chlorides through the Photocatalytic Generation of Chlorine Radicals
作者:Matthew K. Nielsen、Benjamin J. Shields、Junyi Liu、Michael J. Williams、Michael J. Zacuto、Abigail G. Doyle
DOI:10.1002/anie.201702079
日期:2017.6.12
We report a redox‐neutral formylation of arylchlorides that proceeds through selective 2‐functionalization of 1,3‐dioxolane through nickel and photoredox catalysis. This scalable benchtop approach provides a distinct advantage over traditional reductive carbonylation in that no carbon monoxide, pressurized gas, or stoichiometric reductant is employed. The mild conditions give unprecedented scope from
Methylene piperazine-2,5-diones as templates for the synthesis of amino acid derivatives
作者:Christina L.L. Chai、Alison R. King
DOI:10.1016/0040-4039(95)00743-v
日期:1995.6
Methylene piperazine-2,5-diones 5a and 5b are important synthetic intermediates. The preparation as well as the use of these compounds in the synthesis of amino acid derivatives are described. Our studies demonstrate that excellent chiral induction in carbon-carbon bond forming reactions can be obtained with methylene piperazinedione 5b.