A method for synthesizing a 4-amino substituted quinolinone includes reacting a substituted or unsubstituted 2-benzimidazolyl-2-acetate with a substituted or unsubstituted 2-aminobenzonitrile in the presence of a base or an acid. The water screen, which may be realized by a foraminous modular plastic conveyor belt, is formed in an endless loop trained between drive and idle sprockets rotatable on generally vertical shafts. The link Op establishes a reliable message transfer session with the server.