Studies toward the total synthesis of RP-66453

Synthesis of a bicyclic A-B-O-C ring system of RP-66453 (I), a neurotensine receptor antagonist, with an endo aryl-aryl and an endo aryl-aryl ether bond is described. An alternative synthetic strategy starting from the construction of functionalized B-O-C cycloisodityrosine unit is also detailed. [on SciFinder (R)]