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US5637737A Process for the preparation of 2,2-difluorobenzo[1.3]dioxolecarbaldehydes 失效
制备2,2-二氟苯并[1,3]二氧羰基醛的方法

Process for the preparation of 2,2-difluorobenzo[1.3]dioxolecarbaldehydes
摘要:
2,2-Difluorobenzo[1.3]dioxole-carbaldehydes are prepared in a particularly advantageous manner if methylbenzo[1.3]dioxoles are chlorinated, the resulting dichloromethyl-2,2-dichlorobenzo[1.3]dioxole is fluorinated with hydrogen fluoride and the dichloromethyl-2,2-difluorobenzo[1.3]dioxole obtained by this procedure is reacted with a carboxylic acid.
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