| 摘要 |
<p>2,6-Bis(diethanolamino) 4,8-dipiperidino-pyrimido (5,4-d)pyrimidine is made by reaction of 2,6-dichloro 4,8-dipiperidino-pyrimidino (5,4-d)pyrimidine with diethanolamine at 130-200 deg.C under low vacuum, which limits formation of unsatd. by-prods. such as 2-diethanolamino 4,6,8-tripiperidino-pyrimido (5,4-d)pyrimidine.</p> |
