Process for the preparation of 2,2-difluorobenzo[1,3]-dioxole-ca

Details Process for the preparation of 2,2-difluorobenzo[1,3]-dioxole-ca Process for the preparation of 2,2-difluorobenzo[1,3]-dioxole-ca

1994-12-22

1996-06-11

Chan, Nicky

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31762

Patent

active

055257399

ABSTRACT:
According to the invention, a new process has been found for the preparation of 2,2-difluoro-benzo[1,3]-dioxole-cabaldehydes of the formula (I) ##STR1## in which benzo[1,3]dioxole-carbaldehydes are chlorinated, the 2,2-dichloro-dichloromethylbenzo[1,3]dioxoles formed, which are likewise new, are partly fluorinated to give the 2,2-difluoro-dichloromethyl-benzo[1,3]dioxoles, which are likewise new, and these are then reacted with urotropin to give the desired compounds.

REFERENCES:
patent: 4886816 (1989-12-01), Franckowiak et al.

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