7,7,8,9,9,7',7',8',9',9'-decamethyl-3,3'-(2-hydroxy-propane-1,3-diyl)-bis-1,3,8-triaza-spiro[4.5]decane-2,4-dione 在
苯 、
disodium;carbonate 、
水 、
potassium carbonate 作用下,
以
乙酸酐 为溶剂,
反应 8.0h,
以194 was obtained in the form of white crystals, melting at 105°-108° C.的产率得到1,1'-diacetyl-7,7,8,9,9,7',7',8',9',9'-decamethyl-3,3'-(2-acetoxy-propane-1,3-diyl)-bis-1,3,8-triaza-spiro[4.5]decane-2,4-dione