| 摘要 |
1,237,880. Dyestuff intermediate. IMPERIAL CHEMICAL INDUSTRIES Ltd. 4 Dec., 1968 [29 Dec., 1967; 17 Sept., 1968], Nos. 59093/67 and 44095/68. Heading C2C. [Also in Division C4] In Example 1, 4-[#-(methoxycarbonyl)-ethyl amino] - 5 - methoxy - 2 - methylbenzaldehyde is prepared by reacting N-[#-(methoxycarbonyl)- ethyl] - 2 - methoxy - 5 - methylaniline with hexamethylenetetramine in ethanol, treating with a mixture of formic and acetic acids and then with hydrochloric acid. The oil obtained is extracted from chloroform. |
