Reduce number of extents

I have an Oracle 734 database with tablespaces which have 100s of extents.
Is there a way to reduce the number of extents for a tablespace.

Thanks

change storage parameters of all tables in that tablespace using dynamic SQL, change to larger values than actual ones then exp with compress=n, drop tablespace (if no tables from other tablespace would reference the tablespace you are dropping), recreate tablespace, import