"Of all people, Jews should know about ganging up, finding common enemies, telling the big lie," Regan allegedly told Jackson, News Corp. spokesman Andrew Butcher told ABC News, based on notes taken by Jackson during the conversation.
Regan allegedly went on to say that literary agent "Esther Newberg, [HarperCollins executive] David Hershey, [HarperCollins CEO] Jane Friedman and Jackson constitute a Jewish cabal against me."
"All of you people are conspiring against me!" Regan allegedly said, though her attorney Bert Fields denied the charge.
"She didn't say 'Jewish cabal,'" Fields said today. "And even if she had, it wouldn't be grounds for dismissal."
Regan told The New York Times last month that she "contracted with a third party" that told her the money would go to Simpson's children.
"They said the money was not going to Simpson," she said. "If it is, I hope Fred Goldman and the Browns and everyone else can get it."
She also told the newspaper at the time that she would share information about the financial deal with the families.
Simpson, for his part, laughed off the controversy in a November interview with a Florida radio station.
The Simpson book was recalled and destroyed, though Simpson was paid for his "story."
Last month, a HarperCollins news release for the book quoted Simpson as saying, "I'm going to tell you a story you've never heard before, because no one knows this story the way I know it.
"It takes place on the night of June 12, 1994, and it concerns the murder of my ex-wife, Nicole Brown Simpson, and her young friend, Ronald Goldman," Simpson said in the release. "I want you to forget everything you think you know about that night, because I know the facts better than anyone."
The release goes on to say that the book will provide "for the first time ever, a bone-chilling account of the night of the murders, in which Simpson pictures himself at the center of the action."
"This is an historic case, and I consider this his confession," Regan told The Associated Press before the book's publication was cancelled by News Corp. and Murdoch issued a rare public apology to the Brown and Goldman families.