Methods for producing and purifying...

Details Methods for producing and purifying... Methods for producing and purifying...

2006-11-14

2006-11-14

Saeed, Kamal A. (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S308000

Reexamination Certificate

active

07135577

ABSTRACT:
Disclosed herein is a method for producing a 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. The method comprises forming a reaction mixture comprising at least one substituted or unsubstituted phenolphthalein compound, at least one substituted or unsubstituted primary hydrocarbyl amine, and an acid catalyst; and heating the reaction mixture to form 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. An adduct of the 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine is formed either by using an excess of the primary hydrocarbyl amine in the first heating step, or by isolating crude 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine after the heating step and then reacting with a further amount of the primary hydrocarbyl amine. The 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine has a formula:where R1is selected from the group consisting of a hydrogen and a hydrocarbyl group, and R2is selected from the group consisting of a hydrogen, a hydrocarbyl group, and a halogen.

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Notification of Transmittal of the International Search Report and the Written Opinionof the International Searching Authority, or the Declaration' date of mailing, Mar. 28, 2006; 9 pages.

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