乙基 苯基 碳酸盐

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To an ice-cooled solution of 2-amino-3-cyano-5-(phenylthio)indole (1.5 g., 5.7mM.) in dimethyl formamide (20 ml.) was added sodium hydride (0.27 g., 50% w/w dispersion in mineral oil, 5.7mM.) followed by ethyl phenyl carbonate (0.94 g., 5.7mM.). The mixture was stirred overnight and allowed to warm to room temperature. T.l.c. indicated the reaction was complete. The reaction mixture was poured into rapidly stirred water and neutralised with acetic acid. The cream-coloured precipitate was filtered off and dried to give the crude product (1.62 g.) m.p. 181°-2° C. Recrystallisation from ethanol gave colourless crystals of ethyl 3-cyano-5-(phenylthio)indol-2-ylcarbamate, m.p. 190.5°-191.5° C. (0.82 g., 43%). ##STR2## The cream-coloured precipitate was filtered off dried to give the crude product (1.62 g.) m.p. 181°-2° C Recrystallisation from ethanol

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To an ice-cooled solution of 2-amino-3-cyano-5-(phenylthio)indole (1.5 g., 5.7mM.) in dimethyl formamide (20 ml.) was added sodium hydride (0.27 g., 50% w/w dispersion in mineral oil, 5.7mM.) followed by ethyl phenyl carbonate (0.94 g., 5.7mM.). The mixture was stirred overnight and allowed to warm to room temperature. T.l.c. indicated the reaction was complete. The reaction mixture was poured into rapidly stirred water and neutralised with acetic acid. The cream-coloured precipitate was filtered off and dried to give the crude product (1.62 g.) m.p. 181°-2° C. Recrystallisation from ethanol gave colourless crystals of ethyl 3-cyano-5-(phenylthio)indol-2-ylcarbamate, m.p. 190.5°-191.5° C. (0.82 g., 43%). ##STR2## The cream-coloured precipitate was filtered off dried to give the crude product (1.62 g.) m.p. 181°-2° C Recrystallisation from ethanol

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: At the above operating conditions of the reactors and column, the overhead liquid product in flow lines 133 is about 98 mol % ethanol and 2 mol % diethyl carbonate (DEC) while the bottoms product in flow line 119 contains about 35 mol % diphenyl carbonate (DPC), 63 mol % phenol and 2 mol % ethyl phenyl carbonate (EPC). Small amounts of diethyl ether, CO2, phenetole and diphenyl ether (DPE) are also produced. A portion of the bottoms is circulated through the reboiler (80) via flow lines 118 and 120.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To an ice-cooled solution of 2-amino-3-cyano-5-(phenylthio)indole (1.5 g., 5.7mM.) in dimethyl formamide (20 ml.) was added sodium hydride (0.27 g., 50% w/w dispersion in mineral oil, 5.7mM.) followed by ethyl phenyl carbonate (0.94 g., 5.7mM.). The mixture was stirred overnight and allowed to warm to room temperature. T.l.c. indicated the reaction was complete. The reaction mixture was poured into rapidly stirred water and neutralised with acetic acid. The cream-coloured precipitate was filtered off and dried to give the crude product (1.62 g.) m.p. 181°-2° C. Recrystallisation from ethanol gave colourless crystals of ethyl 3-cyano-5-(phenylthio)indol-2-ylcarbamate, m.p. 190.5°-191.5° C. (0.82 g., 43%). ##STR2## The cream-coloured precipitate was filtered off dried to give the crude product (1.62 g.) m.p. 181°-2° C Recrystallisation from ethanol