| 摘要 |
1,159,335. Dyestuff intermediate. YORKSHIRE DYEWARE & CHEMICAL CO. Ltd. 1 April, 1968 [1 April, 1967], No. 15015/67. Heading C2C. [Also in Division C4] In Example 1, N,N-di-(#-hydroxyethyl)- amino-benzene is condensed with methyl chloroformate in pyridine at 15‹ C. The product is isolated by filtration and evaporation of pyridine and excess methyl chloroformate from the filtrate under reduced pressure.
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