| 发明名称 |
PROCESS FOR THE PREPARATION OF SYMMETRICAL 2,2'-METHYLENEBISBENZOTRIAZOLYL PHENOLS |
| 摘要 |
Compounds of formula wherein R1 and R2 are as defined in claim 1, are prepared by reacting a compound of formula with a compound of formula wherein R3 and R4 are as defined in claim 1, and formaldehyde, in a one-pot process in the absence of a solvent.
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| 申请公布号 |
CA2057109(C) |
申请公布日期 |
2002.05.21 |
| 申请号 |
CA19912057109 |
申请日期 |
1991.12.09 |
| 申请人 |
CIBA-GEIGY AG |
发明人 |
LUISOLI, RETO;STEGMANN, WERNER |
| 分类号 |
C07D249/20;(IPC1-7):C07D249/20 |
主分类号 |
C07D249/20 |
| 代理机构 |
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