| 摘要 |
1301944 Quinoxaline 2,4-dioxides IMPERIAL CHEMICAL INDUSTRIES Ltd 11 June 1971 [24 July 1970] 35984/70 Heading C2C Compounds of Formula I in which R 1 is H, halo, or CH 3 and R 2 is H or CH 3 are prepared by reacting compounds II or III in which R 1 and R 2 are as above with a compound R 3 -CH = CH-X in which R 3 is H; 7-10 C aroyl optionally substituted by halo, 1-4 C alkyl or 1-4 C alkoxy; or 2-4 C alkanoyl or alkoxy carbonyl; X is OM (M is alkali metal) or NR 4 R 5 (R 4 and R 5 are 1-4 C alkyl or NR 4 R 5 is morpholino, pyrrolidino or piperidino). |
