Quinolonoquinolone pigments and substituted derivatives thereof

Claim 1

A METHOD FOR PRODUCING QUINOLONOQUINOLONE AND DERIVATIVES THEREOF IN SUBSTANTIALLY PURE STATE, COMPRISING CONDENSING A DIALKYL DIHYDROXYFUMARATE HAVING 1 TO ABOUT 3 CARBON ATOMS IN THE ALKYL GROUP WITH AN ARYLAMINE IN AN INERT LIQUID ORGANIC SOLVENT AND IN THE PRESENCE OF AN ACID CATALYST TO FORM A DIALKYL DIARYLAMINOFUMARATE CONDENSATION PRODUCT, EMPLOYING IN THE CONDENSATION AT LEAST 2 MOLES OF ARYLAMINE PER MOLE OF DIALKYL DIHYDROXYFUMARATE, CYCLIZING THE CONDENSED PRODUCT OBTAINED TO A CARBOXYARYLAMINOQUINOLONE THROUGH HEAT TREATMENT TO A TEMPERATURE RANGING FROM 225-300*C. IN AN INERT LIQUID ORGANIC SOLVENT BOILING ABOVE 225*C., FURTHER CYCLIZING SAID PRODUCT TO A QUINOLONOQUINOLONE BY HEAT TREATMENT TO TEMPERATURES RANGING FROM 90-175*C. IN THE PRESENCE OF AN ACIDIC WATER ABSORBING DEHYDRATING AGENT, AND THEREAFTER RECOVERING THE DESIRED QUINOLONOQUINOLONE PRODUCT.

Claim 2

A METHOD FOR PRODUCING QUINOLONOQUINOLONE AND DERIVATIVES THEREOF IN SUBSTANTIALLY PURE STATE, COMPRISING CONDENSING A DIALKYL DIHYDROXYFUMARATE HAVING 1 TO ABOUT 3 CARBON ATOMS IN THE ALKYL GROUP WITH AN ARYLAMINE IN AN INERT LIQUID ORGANIC SOLVENT AND IN THE PRESENCE OF AN ACID CATALYST TO FORM A DIALKYL DIARYLAMINOFUMARATE CONDENSATION PRODUCT, EMPLOYING IN THE CONDENSATION AT LEAST 2 MOLES OF ARYLAMINE PER MOLE OF DIALKYL DIHYDROXYFUMARATE, CYCLIZING THE CONDENSED PRODUCT OBTAINED TO A CARBOXYARYLAMINOQUINOLONE THROUGH HEAT TREATMENT TO A TEMPERATURE RANGING FROM 225-300*C. IN AN INERT LIQUID ORGANIC SOLVENT BOILING ABOVE 225*C., FURTHER CYCLIZING SAID PRODUCT TO A QUINOLONOQUINOLONE BY HEAT TREATMENT TO TEMPERATURES RANGING FROM 90-175*C. IN THE PRESENCE OF AN ACIDIC WATER ABSORBING DEHYDRATING AGENT, AND THEREAFTER RECOVERING THE DESIRED QUINOLONOQUINOLONE PRODUCT.