Process for producing non-ionic radiographic contrast media util

Details Process for producing non-ionic radiographic contrast media util Process for producing non-ionic radiographic contrast media util

1990-07-05

1993-03-02

Springer:, David

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

Organic compounds

Amino nitrogen containing

560 16, 548462, C07C23365

Patent

active

051911191

ABSTRACT:
Methods are provided for substituting aromatic carboxylic acids and derivatives thereof and amino substituted aromatic carboxylic acids and derivatives thereof, by forming imides and imide-amides, respectively, by acylation with aliphatic carboxylic acids, substituting at least one nitrogen atom under mild basic conditions with an aliphatic compound having as alkylating agent a displaceable functionality and removing undesired acyl groups, as appropriate.

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patent: 4065554 (1977-12-01), Tilly et al.
patent: 4094966 (1978-06-01), Tilly et al.
patent: 4139605 (1979-02-01), Felder et al.
patent: 4250113 (1981-02-01), Wordal et al.
patent: 4348377 (1982-09-01), Felder et al.

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