Not sure if distribute list is supported with ospf on nx-os. i have done it with eigrp with success. not sure if this functionality is added in 6.0.. have a look at this url:
http://docwiki.cisco.com/wiki/Cisco_NX-OS/IOS_OSPF_Comparison
"The NX-OS does not support distribute-lists used to remove OSPF routes from the routing table. The NX-OS does support inter-area Type-3 LSA/route filtering using the
filter-list command configured under the OSPF routing instance."
May be if the other end is IOS, you can filter outgoing updates from ASBR...
Raj