Patent ID: 8058469

Claim:
A method of making a compound of the formula: X 1 â€”C(â•O)â€”X 2 wherein X 1 is NR 1 R 2 and X 2 is NR 3 R 4 or OR 5 , and wherein R 1 , R 2 , and R 3 and R 4 , if present, are each independently selected from the group consisting of hydrogen, optionally-substituted linear or branched alkyl, a heteroatom-containing alkyl, alkene, cycloalkyl, cycloalkenyl, aryl, heteroatom-containing aryl, heteroatom-containing aralkyl, and aralkyl groups, or R 1 and R 2 in combination are a carbon atom double bonded to the nitrogen of X 1 or R 3 and R 4 in combination are a carbon atom double bonded to the nitrogen of X 2 or the N of X 1 or X 2 may be the nitrogen of a ring system, and R 5 , if present, is selected from the group consisting of optionally-substituted linear or branched alkyl, a heteroatom-containing alkyl, aryl, heteroatom-containing aralkyl, and aralkyl groups, or R 1 or R 2 in combination with R 3 , R 4 , or R 5 form a five or six-member ring, said method comprising reacting HNR 1 R 2 , and HNR 3 R 4 or HOR 5 with an ester-substituted diaryl carbonate to form the compound.