Synthesis of N−H Bearing Imidazolidinones and Dihydroimidazolones Using Aza‐Heck Cyclizations
作者:Feiyang Xu、Scott A. Shuler、Donald A. Watson
DOI:10.1002/anie.201806295
日期:2018.9.10
The synthesis of unsaturated, unprotected imidazolidinones via an aza‐Heck reaction is described. This palladium‐catalyzed process allows for the cyclization of N‐phenoxy ureas onto pendant alkenes. The reaction has broad functional group tolerance, can be applied to complex ring topologies, and can be used to directly prepare mono‐ and bis‐unprotected imidazolidinones. By addition of Bu4NI, dihydroimidazolones
Stereocontrolled synthesis of diamines from iodolactams
作者:Spencer Knapp、Anthony T Levorse
DOI:10.1016/s0040-4039(00)95474-1
日期:1987.1
Displacement of iodide from iodolactams by azide occurs with retention of configuration if a catalytic amount of NaH is added, due to the intervention of an N-acyl-aziridine. Several diamine equivalents and a spermidine analogue are prepared in this way.