Bis(methoxycarbonyl)carbene Insertion into N-H Bonds: A Facile Route to<i>N</i>-Substituted Aminomalonic Esters
作者:Suren Husinec、Ivan Juranic、Antonia Llobera、Alexander E. A. Porter
DOI:10.1055/s-1988-27687
日期:——
Bis(methoxycarbonyl)carbene, generated by the copper(II)-catalyzed fragmentation of 2,5-dichlorothiophenium-1-bis(methoxycarbonyl) methylide (3) undergoes rapid and efficient insertion into the N-H bonds of primary and secondary amines to generate N-substituted aminomalonic esters in good to excellent yields.
Modulation of Carbene Spin State Population through Precursor Photophysics
作者:William S. Jenks、Melanie J. Heying、Erin M. Rockafellow
DOI:10.1021/ol802934w
日期:2009.2.19
Dicarbomethoxycarbene can be generated by photolysis of S-C sulfonium ylides derived from thiophene. By manipulating the thiophene (leaving group) portion of the ylide, the initial spin distribution of the carbenes can be strongly influenced, With certain carbene traps, product distributions from dicarbomethoxycarbene depend on the initial spin state distribution in which the carbene is generated and this is used as a means to report on the initial spin state distributions. This approach should be general for other carbenes generated from analogous precursors.