Process for preparing 3-phenacylidene phthalides

Details Process for preparing 3-phenacylidene phthalides Process for preparing 3-phenacylidene phthalides

1986-09-19

1987-10-06

Fan, Jane T.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30788

Patent

active

046984356

ABSTRACT:
A novel process for preparing a 3-phenacylidene phthalide of the general formula (II) ##STR1## which comprises reacting a halogenating reagent with a 2-carboxydibenzoylmethane.
The 2-carboxydibenzoylmethane can be inexpensively prepared, so that the 3-phenacylidene phthalides which are useful as a growth regulant for plants and a safering agent to reduce herbicidal injury to plants can be readily obtained economically in high yield.

REFERENCES:
patent: 4182622 (1980-01-01), Houbion et al.
patent: 4255181 (1981-03-01), Houbion et al.
Knight et al., CA 82(25) 170544r.

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