This is a well done history of the three prior Chapter 11 bankruptcies in which 45 was the principal of the debtor entities:  

Trump Entertainment Resorts: Three Bankruptcies and the Failure to Make Atlantic City Great Again

by Ryan Gallagher

and Andrew Hale

University of Tennessee School of Law, Chapter 11 Bankruptcy Case Studies. 47.

https://ir.law.utk.edu/utk_studlawbankruptcy/47

The article at this link usefully includes access to the pleadings, notices, and orders of these bankruptcy cases.