ethyl N-tert-butylcarbamate

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A stirred mixture of 89 g of ethyl carbamate, 10 g of ®LEWASORB AC-10 and 70 g of isobutene was heated to 70° C. in a stirred autoclave, and stirring was continued at this temperature for 4 hours. After the reaction was complete, the catalyst was separated off and the reaction mixture was analyzed by gas chromatography. It still contained 4.5 percent by weight of diisobutene, in addition to the end product. Distillation of the crude product gave 134 g (92% of theory) of ethyl N-tert.-butylcarbamate of boiling point 70°-71° C./20 mbar. the catalyst was separated off It still contained 4.5 percent by weight of diisobutene, in addition to the end product Distillation of the crude product

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A stirred mixture of 89 g of ethyl carbamate, 5 g of ethanol, 10 g of ®LEWASORB AC-10 and 70 g of isobutene was heated to 70° C. in a stirred autoclave, and stirring was continued at this temperature for 4 hours. After the reaction was complete, the catalyst was separated off and the mixture was worked up by distillation. 136 g (93% of theory) of ethyl N-tert.-butylcarbamate of boiling point 70°-71° C./20 mbar were obtained. Gas chromatography showed that the crude product contained 0.2 percent by weight of diisobutene, but not diethyl carbonate was detected. the catalyst was separated off the mixture was worked up by distillation