Harnessing Energy-Transfer in N-Centered Radical-Mediated Synthesis of Pyrrolidines
作者:Peter Fodran、Carl-Johan Wallentin
DOI:10.1002/ejoc.202000537
日期:2020.6.16
Photo‐initiated energy‐transfer provides a route to nitrogen centered radicals, which can be harnessed in a formal [3+2] cycloaddition. The reaction is scalable, proceeds at very mild conditions tolerates various functional groups, and provides the corresponding trisubstituted pyrrolidines in good to excellent yields.
Twofold Radical-Based Synthesis of <i>N</i>,<i>C</i>-Difunctionalized Bicyclo[1.1.1]pentanes
作者:Helena D. Pickford、Jeremy Nugent、Benjamin Owen、James. J. Mousseau、Russell C. Smith、Edward A. Anderson
DOI:10.1021/jacs.1c04180
日期:2021.7.7
Bicyclo[1.1.1]pentylamines (BCPAs) are of growing importance to the pharmaceutical industry as sp3-rich bioisosteres of anilines and N-tert-butyl groups. Here we report a facile synthesis of 1,3-disubstituted BCPAs using a twofold radical functionalization strategy. Sulfonamidyl radicals, generated through fragmentation of α-iodoaziridines, undergo initial addition to [1.1.1]propellane to afford iodo-BCPAs;