Process for the preparation of 2,2-difluorobenzo[1.3]dioxolecarb

Details Process for the preparation of 2,2-difluorobenzo[1.3]dioxolecarb Process for the preparation of 2,2-difluorobenzo[1.3]dioxolecarb

1996-08-14

1997-06-10

Richter, Johann

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549436, C07D31746

Patent

active

056377371

ABSTRACT:
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.

REFERENCES:
patent: 4886816 (1989-12-01), Franckowiak et al.
patent: 5194628 (1993-03-01), Ackermann et al.
patent: 5344944 (1994-09-01), Franckowiak et al.
patent: 5420308 (1995-05-01), Andres et al.
patent: 5525739 (1996-06-01), Andres et al.
Houben-Weyl (Methoden Der Organischen Chemie), Band VII Teil 1, Georg Thieme Verlag-Stuttgart, pp 210-217 (1954).

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