One-Pot Synthesis of Ureas from Boc-Protected Amines
作者:Constantinos Spyropoulos、Christoforos G. Kokotos
DOI:10.1021/jo500492x
日期:2014.5.16
one-pot synthesis of ureas is described. Boc-protected amines can be transformed into nonsymmetrical and symmetricaldisubstituted and trisubstituted ureas utilizing 2-chloropyridine and trifluoromethanesulfonyl anhydride for the in situ generation of an isocyanate, which reacts with an amine. A variety of amines can be employed successfully, leading to high yields of isolated ureas.
THE SYNTHESIS OF A SERIES OF 3,5-DISUBSTITUTED TETRAHYDRO- 1<i>H</i>-IMIDAZOLE-2,4-DIONES UTILIZING LITHIUM ALUMINUM HYDRIDE
作者:M. Lee Sanders、I. O. Donkor
DOI:10.1081/scc-120003149
日期:2002.1
ABSTRACT A series of 3,5-disubstituted tetrahydro-1H-imidazole-2,4-diones were synthesized from the corresponding urea methyl ester precursors utilizing lithium aluminum hydride as the cyclization agent.