| 摘要 |
<p>1286854 Disilylated amino-mercapto and amino - hydroxy pyrimidines and triazines SCHERING AG 5 Sept 1969 [18 Sept 1968] 44023/69 Heading C3S [Also in Division C2] 2,4 - Disilyl - pyrimidines and 3,5 - disilyl- 1,2,4 - triazines are obtained by interaction of a silylating agent, e.g. hexamethyldisilazan in the presence of trimethylchlorosilane, and a compound II where X is O or NH, Y is N or CH and R is H, C 1-4 alkyl, halogen, NO 2 , CN, mono- or dialkyl-amino, alkoxy, or -CH 2 ) n COÀA (A is C 1-5 O-alkyl, NH 2 or mono- or di-alkyl-amino and n is 0, 1 or 2); 2- and 3-silyl groups are, e.g. Me 3 SiÀS- and 4- and 5-silyl groups are, e.g. Me 3 SiO- and Me 3 SiNH-.</p> |
