SID_LIST_LISX =
    (SID_LIST =
      (SID_DESC =
        (GLOBAL_DBNAME = PDB1)
        (ORACLE_HOME = /oracle/orahome)
        (SID_NAME = CDB1)
      )
    ) 

так тоже работает
        (GLOBAL_DBNAME = PDB1)
        (SID_NAME = PDB1)

а хотелось бы так

        (GLOBAL_DBNAME = PDB1NEW)
        (SID_NAME = PDB1)

-------------------------------------------------------------------------------
lsnrctl status LSTX

Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=xxx)(PORT=1522)))
Services Summary...
Service "PDB1NEW" has 1 instance(s).
  Instance "PDB1", status UNKNOWN, has 1 handler(s) for this service...

CD =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = xxx)(PORT = 1522))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = PDB1NEW)
    )
  )

tnsping cd
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = xxx)(PORT = 1522)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = PDB1NEW)))
OK (0 msec)

connect user@cd
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist