US 7,563,817 B2
Purified 2-aryl-3,3-bis(hydroxyaryl)phthalimidines
Balakrishnan Ganesan, Karnataka (India); Pradeep Jeevaji Nadkarni, Karnataka (India); Kumar Arun Satyanarayana, Karnataka (India); Venkata Rama Narayanan Ganapathy Bhotla, Karnataka (India); Suresh Shanmugam, Karnataka (India); Gurram Kishan, Bangalore (India); and Ravindra Vikram Singh, Uttar Pradesh (India)
Assigned to SABIC Innovative Plastics IP BV, Bergen op Zoom (Netherlands)
Filed on Dec. 14, 2005, as Appl. No. 11/300,225.
Prior Publication US 2007/0135612 A1, Jun. 14, 2007
This patent is subject to a terminal disclaimer.
Int. Cl. A61K 31/405 (2006.01); C07D 209/34 (2006.01)
U.S. Cl. 514—415  [548/487] 17 Claims
 
1. A composition comprising
a 2-aryl-3,3-bis(hydroxyaryl)phthalimidine compound having a formula:

OG Complex Work Unit Drawing
less than 500 parts per billion of at least three of iron, calcium, sodium, aluminum, and zinc individually; and
and less than 200 parts per million of a 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine having a formula:

OG Complex Work Unit Drawing
wherein each R1 is independently selected from a group consisting of a hydrocarbyl radical, a nitro radical, and a halogen atom; “a” is an integer from 0 to 4; and Ar1 and Ar2 are independently at each occurrence an aromatic radical.