How to connect via sqlplus with the connect string

To connect as sys using the entire connect string, use the following syntax:

sqlplus /nolog
SQL>connect sys@'(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=proddb01.mydomain.com)(PORT=1534))(CONNECT_DATA=(SERVICE_NAME=proddb01.mydomain.com)(INSTANCE_NAME=proddb01)(SERVER=DEDICATED)))' as sysdba

Result:

Enter password:
Connected.
SQL> select name,database_role from v$database;

NAME      DATABASE_ROLE
--------- ----------------
proddb01  PRIMARY