反应详情

8.5 g of methoxyamine was added very slowly to a stirred solution of 15 g of 4A in 600 ml of tetrahydrofuran. The resulting mixture was filtered and the solid was triturated with ether to give 1-methoxy-3-(5-(tertiary-butyl)-1,2-oxazol-3-yl)urea (4B), m.p.: 145°-148° C.

1. filtrationThe resulting mixture was filtered
2. customthe solid was triturated with ether