反应详情

One proceeds as described in Example 6 with the difference that a distillating column is attached to the flask, the mixture is maintained in gentle boiling and methanol is removed continuously from the mixture. After 2 hours of reaction the end-product is filtered off, 50 mmoles of methyl N-(4-nitrophenyl)-carbamate and 50 mmoles of 4-nitroaniline are added to the filtrate, and the reaction is repeated. The results of four subsequent cycles are summarized in Table 2.

1. customis removed continuously from the mixture
2. customAfter 2 hours of reaction the end-product
3. filtrationis filtered off
4. customThe results of four subsequent cycles