Synthesis of 1, 3-disubstituted symmetrical/unsymmetrical ureas via Cs2CO3-catalyzed transamination of ethylene carbonate and primary amines

~25%

~92%

~11%

~17%

~34%

~72%

~36%

~45%

~9%

~10%

~15%

~19%

~11%

~91%

~84%