| 摘要 |
The use of a solvent mixture consisting essentially of from 30-70 volume percent dichloromethane with the balance being chloroform, has a profound beneficial effect on the yield of the beta , beta '-dichlorobenzenediacrolein obtained by reaction of the complex of phosgene and N,N-dimethyl-formamide with m- or p-diacetylbenzene. The diacrolein products are readily converted to the corresponding diethynylbenzenes which are useful in the making of acetylenic polymers and copolymers.
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