Patent ID: 8962863
Filing Date: 2015-02-24
Classification: C07D,H04N

Abstract:
1. A process for preparing a compound having the general structure (1) wherein: comprising: a) reacting compound (2) wherein p is 0 to 5; with an alcohol having the structure R 1 —OH under suitable esterifying conditions to provide compound (3) (b) coupling compound (3) with compound (5) wherein Z is a protecting group, under suitable conditions to provide compound (6) (c) subjecting compound (6) to sufficient reducing conditions to provide compound (7) (d) coupling compound (7) with compound (8) under suitable conditions to provide compound (9) wherein R 3 , R 4 and R 5 are each independently C 1 -C 4 straight or branched chain alkyl; and (e) subjecting compound (9) to acidifying conditions, thereby providing a compound of general structure (1).