Method for the preparation of 5-carboxyphthalide

Details Method for the preparation of 5-carboxyphthalide Method for the preparation of 5-carboxyphthalide

2005-05-03

2005-05-03

Shameem, Golam M M (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

06888009

ABSTRACT:
5-carboxyphthalide is obtained with very high purity and in high yields by a convenient process comprising reaction of terephthalic acidwith paraformaldehyde HO(CH2)nH in oleum.

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