Regioselective Suzuki–Miyaura Cross-Coupling Reactions of the Bis(triflate) of 1,4-Dihydroxy-9H-fluoren-9-one

1,4-Diaryl-9 H -fluoren-9-ones were prepared by regioselective Suzuki–Miyaura cross-coupling reaction of the bis(triflate) of 1,4-dihydroxy-9 H -fluoren-9-one. The reactions proceeded with excellent site selectivity. The first attack occurs at position 1, due to electronic reasons.